Chapter Text
It was Friday afternoon and Senku was already ready for Taiju’s arrival; they have always spent time together since in early middle school Taiju defended him from some bullies. He surely could be called that big oaf as his best friend, he was the one that constantly listened to him and helped him in every crazy plan he had, even if Taiju never really understood it, he was just glad to lend him a hand.
Byakuya had recently been accepted in the NASA spaceship training program for astronauts, so every day after school he was by himself and every weekend, Taiju arrived with a bag full of clothes to spend those nights with him, watching movies, eating snacks and just hanging out when Senku had to focused on his experiments.
Taiju's stuff was all packed. That was to say, nearly all of his stuff was already packed. Taiju had been spending his weekends with Senku for a good while now, to the point that it felt almost silly taking a lot of the stuff from his bags when he knew he'd be heading over again once the school week was over. Their weekend would be full of the usual stuff - Senku talking about his most recent (and really confusing!) experiments, and Taiju would nod along happily. Even if Taiju didn't understand half of the things Senku said, he couldn't help but feel so happy watching him ramble passionately!
The walk to Senku's place never took too long. It was a route Taiju had gotten used to, almost as well traveled as his walk to school. He passed a small park on the way, a grassy patch where he and Senku would often set off or test his machines. But, as Taiju's eyes fell on a laughing couple, his mind shot quickly to a thought that had been in the back of his head for awhile. Whoever they were, they looked so happy, giggling in each other's arms, one of them quickly stealing a peck from the other, which enticed a shy but happy reaction from the both of them.
Taiju looked away - he shouldn't be staring so rudely at such an act! But he had found himself noticing it a lot more lately. Even in school, some of his friends (ones that Senku deemed 'too loud and idiotic to be around, even for him') would often talk about the girls in their class. The cutest ones, ones they would date. A few of them even boasted about kisses, about how soft a girl's lips were, or how nice their lipgloss would taste.
There was a cute girl in class. She was kind, and a bit quiet, but great with her fingers whenever it came to school crafts... but Taiju didn't even have the courage to talk to her, let alone talk about... kissing! He usually stayed quiet during those conversations, never sure what to say, not having anything to say...
But he knew someone that'd probably have an opinion. Senku knew absolutely everything. If he brought up the kissing stuff... perhaps Senku would have a great solution for him. Maybe a way to practice, so that he could at least know what the others were talking about. Or, maybe Senku could go on and on about brain chemicals... either way, he wouldn't make Taiju feel silly for asking.
Senku's front door was unlocked, but Senku was also expecting his arrival. Taiju announced his entrance, removing his shoes before stepping fully into the house. Senku heard the enthusiastic yelling of his friend, how the front door closed with a noisy slam, the heavy footsteps eagerly climbing up the stairs and his friend’s dorky face when entering his room. “I don’t get why you returned to your house.” He chuckled and shrugged his shoulders. “You could stay here with me, you already spend most of your time here at the house.” It surely felt nice when Taiju slept next to him and less lonely than the rest of the school days.
"Senku!" He said, inside the room with a wide grin, "are you busy?? I need to ask you about something."
The blonde didn’t like to admit it, but he was already missing Byakuya. Then he noticed he didn’t answer his friend’s question and shook his head to get those embarrassing topics away. “I’m not really that busy, what do you want to ask?”
Senku's smile was so bright, Taiju could already tell their day was going to be fun. Maybe Senku had something planned already. Taiju would always be ready to help with anything, even if it meant hooking up those weird electric things to his arms that made his muscles move on their own!
"I don't wanna be a burden," he said then, putting his bag down near Senku's desk and sitting on the edge of Senku's bed, "well, more of one, I suppose!" his grin was wide, cheeky even. Byakuya was always so kind, allowing Taiju over whenever he wanted, even inviting him on trips or out to restaurants sometimes. He had thought about fully moving in before, now that Byakuya had gone off to start his big space training, but he really didn't want to outstayed his welcome... Maybe if Senku brought it up, not as a joke, he'd consider it.
"Oh, right!" he had a question to ask, it nearly left his mind entirely. Though, now, looking at Senku who was staring back at him with waiting eyes, Taiju began to feel a bit shy. This was... a couple stuff. But best friends should be able to talk about it...! If his other friends at school could, then why can't he talk about it with Senku...?
"What, uh," he stalled a bit, scratching at his cheek, unsure how to word it. Which meant he had to go with his usual style of getting thoughts out: just doing it. "What do you know about kissing?? I mean - not like, your dad or on the cheek, but real kissing??"
Senku furrowed his eyes, why the hell did Taiju want to know that? He just scratched the inside of his ear with his pinky finger. “Well, I just know that kissing causes a chemical reaction in your brain, including a burst of the hormone oxytocin, which it’s often referred to as the love hormone, because it stirs up feelings of affection and attachment.”
He got up from his desk chair and sat right next to his friend, teasingly poking at his ribs. “Why? You want to kiss Yuzuriha? You haven’t even asked her out yet.” Senku glared at Taiju and sighed deeply, it seemed his friend was asking for real as if he wanted to do it soon, not a silly guy talk, that kind of talk he always had with his gorila friends. “I also know that we have to use no less than 34 of our facial muscles, and perhaps up to 146 total body muscles when we kiss. The most important is the orbicularis oris, the muscle that helps us pucker up.”
Senku patted on his friend’s back. “Why? What are you planning on doing?”
Senku was saying so many big words... but Taiju expected this. He did his best to nod along, trying to at least capture the basics... Mostly all he could get out of it was 'kissing makes you feel good'. But he could guess that! People do it all the time! So it had to feel good somehow.
"W-what?!" Taiju could feel his face growing hot from such a question. Yuzuriha was pretty! And he wanted to talk to her more! But he couldn't even get the courage to admit to himself that he had a crush, let alone to her! He began to shake his head vigorously, "no no no, that's not it at all! Besides, I don't even know how!"
Perhaps that was the point...? Maybe that's why it felt so scary. He twisted himself on the bed then, sitting crisscrossed and facing Senku, his hands laying on his knees. "I...! I would like to know how, that's all!" Taiju thought over his own question, a finger propping up his chin as he did. Deep thinking wasn't really his forte, but Taiju knew there was a better way to phrase such a question. He didn't really come here to hear Senku talk about facial muscles, after all. "Do you know... a way people could practice? There has to be a way..."
Senku listened to his friend’s next question, so the big oaf was thinking about practicing kisses, he thought for a bit before answering. He never had really thought about that. “You could practice kissing a pillow as they do on those silly movies that you made me watch, but that doesn’t make sense since the pillow’s texture doesn’t resemble a human’s lips.” And then another thought quickly crossed his mind, in order to practice a kiss, to fully feel how another human’s lips felt, the best possible practice was with another human being.
The blonde’s cheeks blushed a tiny bit by the idea and he scratched the back of his neck before saying it out loud. “I think you’ll need to practice with someone...someone you can trust.” Senku clearly knew the purposes of kissing someone; it was to create a more intimate bond with another person, it also correlates with feelings of attachment and comfort as there was a higher concentration of nerve endings in the lips compared to any other part of the body.
“Well…” He looked up to glare at the deep brown eyes of his friend. “It may sound silly, but since you’re really interested in practicing it as it could also work as a different kind of experiment.”
This was entirely science related. “We trust each other and this can’t get out of these four walls.” He smirked, trying to look confident. “But we could practice with each other.”
Taiju nodded along as always, eager to hear what Senku had to say or what sort of experiments he was going to think up. But when Senku suggested they use each other for practicing...
"What?! Really?!" Taiju's voice bellowed - he never really had a good control of that in the first place. But Senku's smirk said it all. He wasn't joking. Taiju's hands gripped at his knees, brows furrowing as he thought it over... everything Senku was saying was true. They were good friends! Great friends, BEST friends! So if he practiced with anything, Senku was a perfect person. If they messed up or did something stupid then they could just laugh it off.
Senku was a boy though. But Taiju didn't find the thought to bother him at all. Senku brought it up, so it must not bother him, either... and, as Senku had said, this wouldn't leave the privacy of Senku's room.
Slowly, Taiju gave a nod. "Do you... know how to start? Does it matter who starts it? Ah," Taiju nodded then, thinking back to his friends that would talk about these things, or even when he saw couples kiss in movies or at the park. It was usually the boy who started the kiss, right...? But since they were both boys... "I'm taller," he said then. It made the most sense! "So, should I kiss you?"
Senku chuckled, being taller had nothing to do with starting the kiss but he shrugged his shoulders, showing his friend that he didn’t care who really began the act, it was just a plan and vain experiment between two friends.
The blonde noticed how Taiju started leaning his face closer and suddenly it happened, he could feel how his cheeks were getting warmer and how his hands were strangely shaking; Taiju had hugged him, lifted him and carried him around, never getting nervous around him or his body; they had even saw each other naked during school and when sharing baths, but suddenly the idea of having Taiju’s lips so closed to him, felt extremely different.
Taiju was eager to learn and Senku just proposed this, there was no turning back. Both had their eyes closed when their lips touched and at first it was almost as if they didn’t want to kiss each other. Taiju’s mouth was hard on his, unyielding; Senku didn’t know where to put his arms, so he clenched his hands right on top of his lap.
Taiju... had no idea what to do! His hands stayed glued on his knees, his lips he forgot to really pucker... he at least remembered to close his eyes. A panic began to build in him - was he doing this totally wrong...? Even Senku's lips seemed stiff and nervous. Taiju began to worry that he pressured his friend into something he didn't want to do. But it was Senku that suggested it... And it was a chance for Taiju to learn...!
The blonde noticed it, how Taiju’s lips softened. Senku could feel the rapid beat of his heart as he could taste the sweetness of the apple juice still on the brunette’s mouth; his heart was now hammering, and there was a rushing sound in his ears, like bird’s wings begging to be free.
Taiju did his best to relax his body, finding immediately how... nice Senku's lips felt against his. It was nothing like the quick pecks his parents once gave him. Senku's lips were so warm, soft even. Just like Taiju's friends would talk about. He could feel Senku's breath against his face, slow, maybe even a bit nervous too. Taiju could even feel the way Senku's bottom lip quivered, just a bit. Maybe it was too much!
Worried that he was overwhelming his friend, Taiju immediately pulled away, shocked for a moment to see how pink Senku's cheeks were. "S-sorry!" he blurted out, knowing his own face must be red with how hot it felt, "was that... too long? It, uh, felt nice," he laughed, hoping it would clear the air a bit, rubbing at the back of his neck. But it was then that he noticed how tightly Senku's hands were clasped above his lap, the smallest tremble in them.
"You're shaking..." Taiju's brows began to knit, reaching to take his friend's hands, as if holding them would stop them from shaking. "Are you okay...? Was it too much? I felt your lips shaking, too..." Taiju wanted to mention how soft Senku's lips were, but he kept such a thought to himself...
Senku didn’t notice how much he was actually trembling, it was an exhilarating and different experience. Taiju’s strong laugh helped him come out of his inner thoughts, he gasped when the brunette held his hands; Senku didn’t notice it before, but Taiju’s hands felt rough and warm, nicely warm. “I-It felt nice...yeah...I don’t know…” His heart was finally beating with a steady rhythm. “I don’t know if you want to keep practicing.” The blonde said at last. “Maybe later, we could watch some kissing videos, probably we did something wrong.”
So many thoughts were swirling around his head as he didn’t know how long the kiss should last, if it was ok to kept their lips close or if it was important to opened their mouths; it was a whole new world of self-discovery and continuous experimentation, and if Taiju wanted to keep going, Senku wanted too.
The blonde noticed that their hands were still between Tiaju’s strong grip and something within his soul was telling him not to let go of this new closeness; Senku’s lips were also tingling, did he want another kiss? He surely needed to try them more in order to fully practice kissing, but he didn’t expect to actually like this kind of activity.
“We could go grab some dinner and then try it again.” Once more he felt how his cheeks kept burning. “Or…” Was it too weird to say: or we could continue kissing until doing it right?
Senku seemed to be more or less back to his usual self, or at least his shaking had stopped. Taiju couldn't help but beam at that - Senku wasn't upset with him, and that in of itself was great news. In fact... Senku was even suggesting they try again, even bringing up watching something to get their technique right... Taiju felt a burst of excitement bubble in his chest, still holding Senku's hands between his own as he spoke loudly, "we can do that! I bet if we watch someone kissing for real, we can learn from it!"
He stood then, tugging Senku to stand with him, though he finally let go of Senku's hands once they were both standing. Senku didn't object at all as Taiju walked towards the kitchen, their conversations and moods seeming a lot less tense as they talked about dinner. Without Byakuya around they mostly lived off instant noodles and other such meals, which was also the case for that night. As their noodles softened on the living room table, Taiju watched as Senku began to browse through movies on their television. They usually always chose something funny to laugh at as they ate their dinner... but Taiju's mind went back to the things Senku had said just said a short while ago.
"We could watch a chick flick," Taiju said, turning to Senku and already expecting the raised eyebrows, "I-I mean, there's always a lot of kissing in those. And that's probably better than someone talking about. It's like, the real deal, you know?" It made sense in his head. A tutorial would tell them what to do, but a good kiss scene would show them. And...! They wanted to get it right, after all...!
“Sure.” Senku tensed a bit after Taiju remembered him about the chick flick movie, but he offered that solution in the first place. The blonde grabbed the remote control and started searching through Netflix, he really didn’t know any good romantic movie, but he thought anyone he clicked would have one or more kissing scenes; before he started hesitating the selected the first one on the list “The Kissing Booth”, hell, even the freaking title had the word.
The movie theme itself was stupid and kind of lame for him: two best friends with rules to keep their friendship flourishing, of course the girl falls in love with the friend’s brother while also developing the idea to creat a kissing both (ha! movie title) for their Los Angeles Day School Annual Fundraiser Event. Even if this was a movie he surely wouldn’t have picked given another circumstances, he and Taiju started laughing every now and then for the stupid dialogues.
Then the movie important part came, they started kissing on the booth, but the kisses were small pecks on the lips, that was fine, but that wasn’t they were looking to watch; then after several minutes the characters kiss again, and one could really saw the true emotions blossoming from that kiss, lips brushing together, mouths partially opened, bodies so closed from each other and fingers curling in each other’s hands. Ok, they really didn’t even do that.
After the scene ended with one security guard interrupting the lovely kiss, Senku turned his face to glared at Taiju, were they really going to try an intense kiss like that? He gulped, feeling a warm feeling running through his body.
probably why this movie was making Taiju laugh more than feel connected to any of the characters. It was still nice to bond over bashing a movie, but knowing that a kissing scene would soon happen wouldn't leave Taiju's mind. That's why they were doing this. To kiss again.
Their kiss before was nice, at least it ended up being nice after Taiju finally calmed down. But, according to Senku, there was something more to it that they had not yet achieved. This movie would help. And then they would both be able to say they've not only kissed someone before, but that they were great at it...! And maybe, just maybe, Taiju wouldn't feel so strange when his school friends would brag about their girlfriends.
After the kissing scene finally ended, Taiju could see from the corner of his eye as Senku turned to face him. His shoulders felt tense, turning as well. The rest of the movie didn't matter, they weren't even really that into it. But they had seen enough. At least enough to give it another try.
Taiju slowly scooted closer to Senku, noting carefully how his friend didn't object to the way he slowly grabbed his hands. He tried to remember the scene from the movie. It was only seconds ago that they watched it on the screen, but everything in his mind felt as if it was going blank. With a gulp of his own, Taiju slowly brought a hand up to hold Senku's jawline, careful to watch his friend's expression for any signs of uneasiness or wanting Taiju to stop. But, aside from perhaps an equal amount of nerves and pink cheeks, Senku wasn't saying no...
Taiju slowly leaned in then, watching as Senku's eyes were the first to close and followed suit soon after, bringing their lips together just as before. But there was an immediate difference, even Taiju could feel it right from the beginning. Senku wasn't tense against his lips, nor was he trembling again. Instead, Taiju felt how Senku began to lean into it, ever so slightly, reciprocating the kiss.
He was expecting it and this second time it felt better than the first one. Taiju was now touching his face and the heat returned to his own cheeks; his chest rose and fell as he drew in a breath. Senku remembered the movie scene and slowly started moving his lips, feeling something melting inside him that hurt in an exquisite way; he now knew what to do with his hands as he wrapped them around Taiju’s neck-this was the correct position, right? And suddenly he felt his friend’s arms around his waist and everything was transformed and enchanted as everything was making sense.
Their mouths kept clumsy moving, parting and closing, parting and closing as the kiss was getting longer and their bodies were brushing against each other. Was this normal? It felt nice, it felt sweet, it felt great.
Senku didn’t want to pull back but he needed to breath and then he opened his eyes; Taiju brought his head close, resting his forehead on his and they looked at each other and Senku felt weird because he wanted another kiss, another experiment to be sure of the weird feelings swirling inside his skin.
It was all a mixed blur. At the time it felt like it lasted forever, but once Taiju's lips finally fell apart from Senku's he knew then it only lasted a short while. Maybe thirty seconds. Senku probably knew the exact time. But Taiju couldn't focus on stuff like that, at the time he could only focus on how soft Senku's lips felt against his, how Senku's breath shuddered against his own lips, how... nice it felt when Senku's arms wrapped around their neck and their bodies had moved closer.
“I-I think...this is how people are supposed to kiss…”
It was all a mixed blur. At the time it felt like it lasted forever, but once Taiju's lips finally fell apart from Senku's he knew then it only lasted a short while. Maybe thirty seconds. Senku probably knew the exact time. But Taiju couldn't focus on stuff like that, at the time he could only focus on how soft Senku's lips felt against his, how Senku's breath shuddered against his own lips, how... nice it felt when Senku's arms wrapped around their neck and their bodies had moved closer.
"We...! Should pick a different movie!" His voice was loud, happy, hoping that this wouldn't make their friendship awkward. "This movie was super lame - we can find one better, I bet!" Grabbing the remote, Taiju stopped the odd kissing movie and instead began to browse actions and comedies. Something more to their style. Something without deep, sensual kisses that would cause him to want to ask for another try.
Senku nodded, feeling weird by the sudden separation of their bodies, he really thought Taiju was going to ask for another kiss, but it seemed the experimenting part had ended. A lingering sensation was left on his own lips, missing Taiju’s...he shook his head to try and forget, obviously it was the hormone oxytocin running inside his body that was messing around his mind, confusing a simple kiss between two best friends in feelings of affection and attachment.
Taiju picked a different movie and the blonde was thankful for that, he didn’t need to see more lame kissing scenes. Everything went back to normal, their typical chatter, getting excited by the fighting scenes and losing their mind with all the different weapons and martial arts techniques that the protagonist was using; Senku loved this kind of movies, because even if they were physically impossible, he loved how Taiju got excited with every passing second.
Then when the movie ended it was already midnight and Senku stood up from the couch, stretching his body and cracking his neck. “I’ll go now to bed.” He said before walking down the hallway towards his own room; Taiju knew perfectly the house and he had complete access to everything he wanted to eat or do, but something inside him got pleased the moment his friend nodded and followed him.
Once inside his bedroom, Senku stripped and started putting on his pajamas with small rocket drawings, then he climbed into his own bed and set himself on the right side, always leaving the left side for Taiju. The brunette had the option of sleeping on the couch or even in Byakuya’s bed, but since forever both preferred to shared the bed as they loved to talk about anything before falling asleep; sometimes Taiju would heard Senku’s new experiment’s ideas or the blonde would listen carefully to some good old ghost stories, he knew they weren’t real, but the illusion in the brunette’s eyes were everything to listen carefully to his words.
Taiju happily accepted the spot next to Senku, having just changed himself into his own pajamas. Nothing cool and matching like Senku's, just some boxer shorts and a loose t-shirt, but they were comfortable! As he laid himself on Senku's bed, the blankets being pulled up over the two of them, Taiju's mind was a million miles away from the kiss. It was an experiment, after all. Senku does loads of them! Some even use Taiju's body...!
But even so, as the night went on and they softly spoke their usual chatter, Taiju kept finding his gaze falling to Senku's lips. Did they always have that slight pink hue, even in the dark? His bottom lip was more plump than his top one, maybe that's why it was so easy to feel it quivering... Were his own lips special like that...? Were they soft? Did Senku like anything about them...?
Taiju did his best to push such thoughts away. This was his best friend! It was almost becoming a mantra for him. The kiss felt so nice, that was all. Perhaps he enjoyed it a little too much. Senku was such a good friend in the first place for allowing him to practice such a thing!
Their conversations became slower, quieter. Taiju wasn't sure who fell asleep first, actually, him or Senku. But he knew sleep took him eventually. The night wasn't too warm, so Senku's body heat was a welcome addition. Sleeping alone was really, really lonely after you got to sleep with someone else for a change. Taiju couldn't remember when, his mind half asleep as his body rearranged itself in the middle of the night, but his arm eventually found it's way around Senku's sleeping body. It wasn't the first time. Taiju always was the type to need to squeeze something as he slept.
Taiju’s strong arm pulling him closer to his chest, woke Senku up; it wasn’t the first time that his friend hugged him in his sleep and since the night was cold, the blonde greatly appreciated being near Taiju’s warm body, but something felt extremely different. He shook his head, trying to get away the memories and the thoughts, why did he keep remembering their 2 kisses? It was a silly experiment, nothing too serious.
But it felt nice.
Senku looked up, catching the brunette’s sleepy face; was Taiju always so handsome while he slept? The blonde furrowed his brows and closed his eyes . Why the hell did he think Taiju was handsome? No, he wasn’t. Yes, he was.
His lips looked so thick and slightly moist and a sweet burning sensation invaded his whole face and chest; maybe if he kissed him again, he could be sure that it was just a silly idea, a stupid game and a lousy experiment. Someone can’t fall in love just by a simple kiss, especially when both of them knew nothing about kisses. Senku bit his lip and erased the idea of falling in love, human love relationships were a nuisance and Taiju was his best friend, of course feelings like those didn’t exist.
Senku wanted to try it one more time; did the human body react when receiving a kiss while sleeping? He surely wasn’t going to be left with the doubt. Senku just hoped Taiju won’t get mad, it was his stupid idea in the first place. So he did it, he wrapped once more his arms around the brunette’s neck (that was the movie technique) and gently pressed their lips together, just this time he left his red glare partially open.
Taiju's dreams were always pretty exciting. Big explosions, saving the day, alien invasions, beating up bad guys. Occasionally his friends appeared in his dreams, and occasionally his dreams were rather simple, as if just reliving his previous day. Which was probably why Senku kept appearing in his dreams that night. Different scenarios, some totally wild like the both of them walking on the moon thanks to some new wild invention of Senku's, another time they were simply in school. But the weirdest part of the dream came later, as they were eating lunch at school, talking excitedly about how their new teacher was a real actual vampire. They were laughing, making jokes. And then Senku kissed him.
Where did it even come from...? Even stranger still, Taiju was so happy to begin kissing back, no longer focused on their lunch or their cape wearing teacher but instead on his warm lips, his soft cheeks, the way Senku's arms wrapped so eagerly around his neck...!
And then everything went black. Or, at least dark, Taiju's eyes fluttering open and slowly realizing that it was all just a dream, he was in Senku's room, the both of them sleeping. Was it... shameful of him? Dreaming of kissing his friend...? It wasn't anything more than an experiment. Senku probably wasn't even that big on kissing, he never once showed interest in it before...
But there was a heat on Taiju's lips, causing him to glance down. Senku was... so close. Taiju could make out the darkest hint of Senku's open eyes, signaling that he, too, was awake. Their bodies were entwined, Senku's arms around Taiju, just like in the dream, and Taiju's own arm coiled around Senku. But that...! Was normal! He always tended to do that...! Snuggles felt nice, and Senku never seemed to mind...
"Senku..." Taiju slowly whispered out, brows furrowing. Snuggles were one thing but they had never slept this close before. "Is... everything all right...?"
“Yes, everything’s all right.” Senku was a bit embarrassed to have woken up his friend, but there was something in their closed snuggle that he didn’t want to pull back. “I-I just wanted to experiment a bit more, to know if one could feel a kiss in their sleep.” His red eyes looked down, maybe he overstepped a boundary, but Taiju didn’t move and didn’t push him. “From what I analyzed, by kissing you, you suddenly woke up.”
Senku never admitted that he really liked to cuddle with Taiju while sleeping, feeling the bed extremely cold and empty during the week and longing for their weekend together, but he didn’t know if this was something best friends do as he didn’t care to talk about it, just letting the brunette’s body to approach and touch his own and now, after kissing for the first time, he couldn’t shook the memories and the feelings away, wanting to kiss more, to experiment more.
Deep down he was afraid that it suddenly stopped being an experiment and something that he was actually enjoying, but that was crazy right? “I’m sorry for waking you up…” he whispered and didn’t know why, why was he so ashamed? so nervous and so excited at the same time.
"Hmm...?" Taiju hummed inquisitively, his head beginning to tilt. So Senku was still curious about some kissing stuff...? They had learned basically everything, but Senku was always thinking about new things, so of course he would have thought of new experiments! Taiju gave a laugh, his grin wide. "That's okay! You love to find out everything about something! I don't mind being your guinea pig!" The term made him chuckle a bit more. Taiju was always Senku's test subject, but Senku never pushed him past his limits! Taiju knew that Senku cared for him just as much as he did for Senku!
"Are there other things you want to try?" Taiju asked, feeling oddly excited by the thought. His mouth opened for a moment, eager to tell Senku that he totally had a dream about kissing him right before he woke up, but he stopped. Such dreams felt... a little too real. Not like 'just friends' running an experiment. The dream would probably scare Senku, or cause Senku to tell Taiju that the experiments had gone too far and they needed to stop. So, instead, Taiju kept the dream to himself.
Senku hadn’t thought about what other things they could try, maybe tomorrow morning he could research a bit more about kissing techniques and what implications it had on the body. “I think for now we could continue with this.” He swallowed, feeling how his cheeks were almost burning from embarrassment, he was glad that the room was dark so Taiju couldn’t see the bright pink color on his face. “I mean, we’re already in the perfect position to continue with the experiment...we kiss by day while sitting in my bed and on the couch…” Senku was glad that Taiju was eager to continue with the experiment, there was something in his heart that the blonde didn’t want to stop. “It feels different when we kiss by night while laying in bed together…”
The blonde was never a person that would double think things, if he wanted to do something, he'd simply do it and that was it, Taiju would tag along and help him during all the way.
Senku united their lips again, tightening the grip on the brunette’s neck; it felt different, amusing and a little gasp escaped from his mouth when Taiju pulled him closer together. Senku wasn’t stupid and he noticed it right away during this third kiss; he was desiring it, to kiss Taiju was his true desire; only that and nothing more. The blonde’s heart was pounding hard by the second and a cute sound was captured between Taiju’s lips when he felt a tongue trying to part his lips…
Was tongue necessary during kisses? Was it normal? And why did his body get excited by the idea of a tongue inside his mouth?
Taiju didn't remember the kiss that Senku had stolen before he woke up, simply because he was asleep at the time. But Senku stated it felt different, so Taiju was excited to try and see if it really was as different as Senku said it was. It was still a learning experience, after all!
Once again, Senku's warm lips fell against his own, his body being pulled closer, Taiju also moving his arms so tight around his friend. Was it sweeter? Warmer? Perhaps the blankets around them made things feel a bit too hot, but Taiju couldn't find himself minding all that much. Slowly their mouths had opened, just as before, but this time Taiju's own sleepy mind and body allowed his tongue to come more into play. He had seen it before, in movies... usually the ones he wasn't allowed to see around his relatives. It felt so adult, a little wrong in a way, but Senku's gasp as Taiju let his tongue slide across his soft bottom lip was so... good? Taiju couldn't exactly place why it sounded so nice....
It was messy, but not bad, Taiju feeling Senku's tongue begin to slide against his own. A part of it was even a little funny - he could taste some mint on Senku's tongue, from the teeth brushing they did right before bed. If they did this at a different point in the day would Taiju taste something else? Sweets? Soda? Maybe even ramen - though that didn't sound as appetizing.
A sigh began to leave Taiju. He was content, for some reason. Comfortable, happy. Senku seemed happy too, putting just as much energy into the kiss. Taiju felt a little bad as his eyes began to feel heavy again, but he was just too comfy there, and still partially half asleep to begin with. He wasn't sure when it happened, but the kisses stopped - at least, they did for him, seeing as he had totally fallen back asleep mid-kiss.