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It started one night, close to bedtime. Amane and Tsukasa were getting changed into their pyjamas, getting ready to sleep. Tsukasa was grateful for sleep tonight, he had spent the day feeling really weird, noticing strange things about his brother he hadn’t noticed before, and just wanted to wake up feeling normal in the morning. He loved his brother dearly, but this feeling was strange and it kind of scared him. He felt like he was going to lose control of his body, going to do something... he didn’t know what, and he even entertained the idea of just letting go and finding out. Instead he repressed it. They had school tomorrow anyway.
“Tsukasaaaaa your turn to brush your teeth.” Amane called out from the bathroom, leaning out of the open door. His toothbrush dangled out of his mouth and just a little bit of the white foam from the toothpaste leaked out of his mouth, down his chin and onto his pyjama shirt.
That sight riled Tsukasa up again, just when he thought he was going to be able to go to sleep. But no, Amane’s stupid mouth had to drool. He had to do it in front of Tsukasa, had to let that wet stuff drip all over his shirt with his mouth hanging half open, had to pull his toothbrush out in a way that made Tsukasa’s body hot, had to stick his soft, wet tongue out and lick over his lips trying to get the toothpaste that dribbled out…
It was driving Tsukasa wild. Why? Why was his brother’s toothpaste accident making him feel that funny feeling again? He hated it, hated the warmth spreading all over his body, making his clothes feel itchy and his mouth feel dry. But he also didn’t completely hate it. After all, it felt kind of… good.
He tries to shake the feeling off and go brush his teeth so he can go to bed like he’s supposed to. Even though he tries to focus on opening the lid on the tube of toothpaste, he feels that warmth spreading through his body. Time to squeeze some on his toothbrush, as he feels his fingers tingling with need. Make sure to brush properly, but his head feels so fuzzy. Rinse and spit, try not to make a mess, the toothpaste in the sink reminds him of Amane’s mouth…
When Tsukasa returns to their shared room, he spots Amane on the floor, reading a book. He lays down on the floor next to him and peeks his head over. Tsukasa can feel the warmth of Amane’s body against his own, it makes his head even cloudier.
“Whatcha reading, Amane?” he asks.
“Hmm? Oh, a book about dinosaurs. They were like big lizards, reaaaally big.” Amane explains by sitting up slightly and spreading his arms up and out as wide as he can.
Tsukasa is initially fascinated with how big these dinosaurs supposedly were, but quickly gets distracted by the way Amane’s bed shirt rides up slightly. The skin right next to his bed pants looks so soft, so warm… Tsukasa can feel his mouth watering, his skin tingling, that warmth reaching the last ends of his body. He felt on fire, he couldn’t stop himself anymore, he knew what he needed to do.
He doesn’t really understand WHY, but he KNOWS he needs to do this. Something in his body tells him if he doesn’t do this, he will be in pain, he might even die.
Tsukasa pins him down on the floor, legs spread over Amane's hips, hands pinning Amane’s to the floor.
“Tsukasa? What… are you doing?” Amane asks, voice slightly shaking.
Tsukasa’s eyes are half lidded, breath coming heavy. Amane looks so scared, but he still smiles and tries to play it cool, pushing against Tsukasa’s hands to escape. It’s no use though, at this moment Tsukasa is stronger. Amane whines.
Amane struggles, pyjama bunching up his tummy with his movements. Tsukasa's eyes go wide. the skin there, has it always looked so tasty? He leans down and licks at his brother's tummy, and Amane whines again. Tsukasa’s tongue is wet and warm, leaving trails of saliva over Amane’s skin. Tsukasa’s body feels hot, too hot, finally able to taste Amane like he’s wanted to all day. He's so sweet, just like Tsukasa expected. He can feel his cock getting harder, Amane’s struggling against his hips doesn’t help either. Tsukasa forgives him, though. In his eyes, Amane is perfect, nothing he does is ever enough to anger him. Besides, it feels really nice.
Tsukasa wants to know where else tastes sweet, looking for other open areas of skin. He settles on Amane’s neck. He licks a long line up Amane’s neck, moaning at the taste. A combination of Amane’s sweat and the toothpaste.
“Mmm… Amaneeee~ you taste so good.” Tsukasa whispers in Amane’s ear. His voice has gotten lower and rougher since this started, startling even Tsukasa. He feels like he’s doing something wrong, but he doesn’t want to stop. He can’t stop.
Tsukasa then bites Amane's neck, a quick little nip. It hurts, Amane gasps, letting out a little shout. Tsukasa quickly covered Amane’s mouth with his hand, shushing him.
“Shh! Shut up! Mom and dad are downstairs still, do you want them to hear?” Tsukasa whisper-shouts.
Amane mumbles something into Tsukasa’s hand. It’s okay though, Tsukasa understands him and lets go of his face. Amane doesn’t want to get in trouble either, so he’ll be quiet.
It turns out Tsukasa's sharp teeth broke the skin a little bit, a tiny trickle of blood coming out. Oh, oops, he didn’t really mean to hurt Amane. But… Amane’s blood also looks tasty. Tsukasa licks the tiny wound, making sure to get all the blood up. It tastes good, so good. He wants more. He keeps giving little nibbles and then licking and sucking at Amanes neck, making sure to bite the other side too. The sensation makes his cock twitch in his pants. Amanes blood feels like an aphrodisiac, and Tsukasa can't get enough.
“Tsukasa, stop… it hurts…” Amane whines, trying to push Tsukasa off of him.
Tsukasa sucks on his neck again and Amane monas this time. Amane must be feeling good too, he must be feeling that hot feeling just like Tsukasa is. He feels Amane’s dick hardening under his hips too. The idea that Amane feels a similar sensation makes Tsukasa so eager to please his brother, he wants him to feel good too.
Tsukasa starts to move his hips back and forth on Amane’s, still licking at his neck.
“No, stop…” Amane pleads. But Tsukasa knows better, he can hear the desperation in his brother’s voice, he knows Amane wants more too.
The thin fabric of their pyjamas does nothing to hide the bulge of Tsukasa's hard little cock as he moves his hips. He might not understand it fully, but he does know it feels good. so good. He doesn't want to stop. Amanes hardening cock reacts to the extra movements, the friction between them. Tsukasa grinds down on Amane’s hips, making their cocks rub up against each other.
“Amaneeeeee~” Tsukasa whines, “your thing is hard too, it feels so good~ please-- Amaneee~”
Tsukasa’s mouth is right next to Amane’s ears, gasping and moaning and whining with each little thrust. Tsukasa’s arms move to wrap around Amane’s shoulders and cling to his shirt. Amane’s mouth is hanging open, soft pants and moans escaping him. Amane wraps his arms around Tsukasa and holds him close to him.
“Mmmnh Amane, haaa~ Amane, Amane~ more~”
“Nng, Tsukasa…” Amane gasps out, rolling his hips up to meet his brother’s. His breath is hot on Tsukasa’s neck, and Tsukasa can feel every syllable of his name breathed into his ear. It drives him wild.
“AHH ah haaaa-- Amaneeeeeee~!” Tsukasa whines, “please do it againnnn, please Amaneee~ pleaseeee!”
“Nnngh Tsu-Tsukasa haa…” Amane moans, wrapping one of his legs around Tsukasa’s waist and pushing his hips up harder now. There are little tears at the corners of his closed eyes.
Amane’s gasping out his name makes Tsukasa's head so dizzy, he feels so faint like he's barely there anymore. Amane wants this, wants him just as bad as Tsukasa wants him. The pressure between their hips, their cocks rubbing each other through the pyjama pants, it makes Tsukasa feel so overwhelmed, so good. He clings to Amane’s body, he knows if he lets go he will surely die.
“Amaneee~ mmmn, feels so good, Amaneee, haaa-- do you feel good too?” Tsukasa asks, voice a low whisper, still gasping and moaning in Amane’s ears.
Tsukasa feels Amane’s cock twitch in his pants, the fabric between them getting wet and slick. Amane moans loudly, nodding his head even though Tsukasa can’t see him do it. Tsukasa can feel him so much better now, can practically imagine the exact shape and size of Amane’s cock and balls. Tsukasa keeps panting Amane’s name over and over, and every time he says his name he can feel Amane twitch and his breath hitch. It’s intoxicating to Tsukasa, knowing Amane wants this so badly, feeling his body’s response to Tsukasa’s actions. He feels so light headed, like he’s about to fall off the edge of someplace really high up even though he’s on the floor on top of his twin brother.
“Amaneee~ haaa, pleasee-- pleaseee~ I feel it haaa~ Ah-Amane mmmmnnnn~!” Tsukasa pushes his hips down frantically, humping his brother with everything he has. It feels desperate, feels like the most important thing ever in the world, if he stops now He Will Die.
“Nnnggg- Tsukasaaa~ mmmm,” Amane moans in response.
Amane pushes Tsukasa up slightly, just enough to connect their lips, and kisses Tsukasa. It’s messy and wet, drool dripping between their mouths and down their chins as Amane shoves his tongue in Tsukasa’s mouth. Tsukasa meets Amane’s tongue by rubbing his own against it. Amane’s tongue is cold and wet and kind of slimy, but it pushes Tsukasa closer to that edge. Tsukasa is so far gone, lost in such bliss that he almost doesn’t feel real in that moment.
Suddenly he separates from Amane’s mouth, Amane trying to bring him back down to his lips. He buries his head in Amane’s neck, gripping his shirt tightly as he cums in his pyjama pants.
“Amaneee~ nnghh Amaneee~ haaa~ Amaneeeeee, Amaneee~” Tsukasa whines, a broken sobbing moan, as his hips still and his cock twitches and his body jerks slightly, little spasms, and his pajama pants get wetter than before, stickier.
“Nng Tsu-- kasa-- hnn, Tsu-- ah,”Amane grunts out as he cums, continuing to move his hips and ride it out. He pulls Tsukasa’s body closer to his, as if he’s trying so hard to get inside his body somehow.
They both lay there, Tsukasa limp on top of Amane, sweaty and panting on the floor of their bedroom. Tsukasa sees stars behind his eyes, feels Amane’s hot breath on his skin, and he wishes they could go take a bath together.
“Come on, Tsukasa… get up.” Amane whispers, still breathy and hoarse.
He pushes at Tsukasa’s body, but Tsukasa clings to his shirt and nuzzles his neck. There’s a few bruises on Amane’s neck. He feels proud that he made them, but scared at what mom and dad might say.
“Tsukasa, we have to go to bed…” Amane sighs.
“Mmn, nuh… I wanna sleep here tonight.” Tsukasa is sleepy and doesn't want to move.
Amane sighs and rolls over, pulling Tsukasa with him. He carries his brother to his bed and lays down with him. He can’t get Tsukasa to stop clinging to him so he’s just going to have to sleep in the same bed tonight.
Once they're under the covers, Amane pets Tsukasa’s hair, moving some hair that’s stuck to his face to behind his ear. It’s soothing, and Tsukasa swears in that moment that nobody will ever make him feel the way Amane does.
“Amane?” Tsukasa asks, yawning.
“What is it?”
“I love you, Amane.”
There’s a moment of silence. Tsukasa feels his stomach drop, worried.
Amane sighs.
“I love you too, Tsukasa.”