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Diluc was a wildfire. His eyes were a window to roaring flames that charred and churned all that came close to him. Most knew better than to get near him like this. Most were wise enough to give him the space he politely asked for when he was like this.

Kaeya, however…

Diluc seethed in his seat, sitting at the foot of his bed, arms crossed.

“C’mon, bro.” Kaeya made no attempt to hide his smile. “I gotta wear something classy, or dearest father will be upset with me. And you know me, I just can’t figure out what to wear.”

Diluc tapped his foot on the ground with the rhythm of a war drum.

Kaeya was shirtless, trousers unbuttoned and unzipped as he picked up some clothes.

Diluc’s eyes watched the way the warm spring sunlight, which they had been deprived of for too long, grace Kaeya’s tanned skin.

It was as if the sun was kissing Kaeya’s skin.  

Diluc wondered what it would be like to kiss—His foot slammed on the floor, tapping stopped. “Hurry up. I don’t have all day to help you figure out how to put a shirt on.”

“Please, Diluc, you think so lowly of me.”

“Do something about it.”

“Okay.” Kaeya slipped on a dark navy shirt. He began buttoning it up, starting from the bottom. Each button slipped with almost carnal movements into each slit, painfully slow, and Kaeya’s eyes never left Diluc once.

Diluc’s eyes looked away from those buttons, instead flicking to the fabric that hugged Kaeya’s shoulders. The muscles of Kaeya’s arms could be seen well through the cloth, and Diluc scowled.

“Don’t like it?”

“I didn’t say that.”

“What’s the matter, Master Diluc?”

“Don’t,” Diluc warned with a sharp look.

Kaeya moved his hands away from the buttons. “Does it match?”

“Are. You.” Diluc breathed in deeply. “You can’t leave the top four buttons unbuttoned.”

“Why not?” Kaeya looked down. “I work out pretty hard for this body. What’s wrong with showing it off?”

“You can have one button popped.”

“No way.” Kaeya pouted. “Three.”

“Two.”

“Fine.”

Diluc relaxed into his seat. At least Kaeya wasn’t entirely fighting him. But, damn. Diluc’s eyes focused as his expression faded. Kaeya was not kidding about those muscles—Kaeya’s abs had now been covered, but his pecks, the definition of his collarbone… Kaeya had a relatively slim build, but he was tall. His muscles were defined, and it showed.

There was a time, once—

No, Diluc tried to stop his thoughts from going there. He tried to stop his thoughts from going to when he was jealous of Kaeya. Diluc also had a slim build, though shorter. His height, however, was not his problem. No matter how strong he got, Diluc was always… pretty. Not the way Kaeya was, not like a mischievous panther, lean and strong, playful and dangerous.

No, Diluc’s body was always too slim, too small, too weak, too—

“Master Diluc.”

Diluc’s eyes drifted up.

“The trousers? Do they match?”

“Of course not, you fucking moron. Who the hell wears white pants? Take those off.”

Kaeya whistled. “Alright, alright.” He grabbed the waistband and slipped them off. “Pretty boy knows what he likes—”

Diluc was a wildfire. His eyes were a window to roaring flames that charred and churned all that came close to him. Most knew better than to get near him like this. Most were wise enough to give him the space he politely asked for when he was like this.

Kaeya, however…

Diluc seethed in his seat, sitting at the foot of his bed, arms crossed.

Oh, who was he kidding?

Diluc felt warm, felt hot, felt like his insides melted. Oh when Kaeya called him pretty… It wasn’t like the other boys. The other boys always teased him, for being so rich and so pretty, so out of touch with Mondstadt, so out of touch with Barbatos. They always called him pretty, as if saying all his achievements were nothing but his looks and his father’s money.

Kaeya, though.

Kaeya, who spared with him, who challenged him, who lost spars to Diluc’s claymore more than any other—

Diluc looked at his own arms. Strong, but slim. Powerful, but with softness that belied their strength.

When Kaeya called him pretty…

“Which one, Master Diluc?”

Diluc’s head snapped up.

Kaeya actually pouted. “Here I am, half-naked, giving you a show, Master Diluc, and your head is lost in the clouds. Not fitting for the next Cavalry Captain.”

Diluc felt another flash of heat. Anger, yes, but oh how a red line must’ve streaked across his cheeks. “Listen, brother dearest, just put on a pair of pants and we’ll see.”

“Alright, alright.”

Diluc didn’t even try to hide it this time, eyes sharp on Kaeya’s body.

Yes, Kaeya’s legs were almost royal. Yes, his athletic thighs seemed absolutely biteable. Yes, his hips had the lightest brush of curve to their slender form… but that was not where Diluc’s eyes went.

Everything else, Diluc could have forgiven himself for, but his eyes went where it always went whenever Kaeya wasn’t watching.

Diluc murmured, “Barbatos,”

Sure, he had heard some guys were showers not growers, but there was a notable heft to Kaeya’s package as he moved.

Diluc made a silent prayer.

“Alright, so…” Kaeya pulled up a pair of black trousers. “You think this is too dark for a spring event? I mean, I know it’s a nighttime celebration, but still.” He looked up. “I could use your expert advice, Master Diluc.”

Diluc’s face melted as he looked away.

“Oh? Is something the matter, Master Diluc?”

“Stop calling me that.” Diluc shot him a glare. “You invite nothing but trouble.”

“Do I?” Kaeya’s smirk showed a bit of teeth. “How so?”

“Shut up. How many times have I gotten in trouble with father because of you?” Diluc pulled one leg up on the bed and moved an arm around it. “Whether it’s being late for events, messing up my speech… Do you want me to bring up the cecilia event again?”

“Hey, now. We were kids and I had heard it from some of the older boys.” Kaeya chuckled. “How was I supposed to know it was that potent if you smoked it—”

“Why are you so much trouble?”

“Hm.” Kaeya faced him. That dark navy shirt hugging his arms just right, those pants snug at the hips. He crossed the distance and pressed a knee on the foot of the bed, next to Diluc. He moved their heads close. “Maybe I like the idea of a pretty rich boy getting in trouble.”

Diluc’s eyes widened. His eyes were a window to roaring flames that charred and churned all that came close to him. Most knew better—

Kaeya slipped away, turning back as he grabbed another shirt from the row. “Maybe something lighter?”

Diluc shoved off the bed and stood. Each step was a flash of heat as he reached for Kaeya, hands almost forming into claws. Intent to kill.

Kaeya spun, smiling despite all the warnings.

“You.” Diluc grabbed the shirt. “This is far too dark for spring. Off.”

“Yes, Master Diluc.”

“Shut your mouth.” Diluc unbuttoned the bottom buttons as Kaeya worked on the top ones. Soon, the shirt parted and Diluc ran his hands down Kaeya’s arms, fingertips kissing the skin the way the sun did, as he shoved the shirt to the floor.

“Master Diluc—”

“Don’t fucking call me that,” Diluc warned.

“Hey, Diluc?” Kaeya met his gaze. “Make me.”

Diluc pulled his arms back, as if about to shove Kaeya, but his hands firmly grabbed Kaeya’s sides, feelings those abdominal muscles. He let out a sweet noise as his hands worked up to Kaeya’s chest.

Kaeya was grinning, wildly. “Doing this to your own dear brother—”

“Fuck you.” Diluc grabbed him with a firm grip and spun, throwing Kaeya with force.

Kaeya actually yelped as he landed on the bed. He spun to be on his back, eyes wide.

Diluc smirked, running his tongue on the inside of his teeth. He shook his head as he moved, climbing on top of Kaeya.

“Diluc—”

“Shut it.” Diluc was on top of him now. He grabbed Kaeya’s belt and tugged it, throwing it aside. “Your trousers. Off. Now.”

“I like it when you’re like this,” Kaeya whispered with a smile. He kicked off his pants, letting them slide off his thighs and his legs, leaving him in only those pair of black tight boxers. “You’re a wildfire, Diluc.”

Diluc traced a hand down Kaeya’s chest, fingertips brushing against the short strands of dark blue hair that started as his navel and went lower. “I’m a wildfire?” His eyes were a window to roaring flames that charred and churned all that came close to him. “Most people know better, Kaeya…”

Kaeya smirked. “Guess I’m not most people.”

“No.” Diluc’s hand slid lower, cupping the outline of the hard but clothed length. It was almost electric, how his body shook at the feeling of it. He had never expected it to be so warm. “Dearest brother.”

Kaeya almost chuckled. “Yes, Master Diluc?”

Diluc licked his lips, eyes flicking down to Kaeya’s boxers. “You know what I’m going to say, don’t you?”

“Maybe I want to hear you say it.”

Diluc met his gaze and tugged at the waistband of Kaeya’s boxers. “Off.”