Domestic life suited Kyoya, Kaoru was proud to note. At home, cuddling and watching movies, or talking as they lay in bed, or standing beside each other in the kitchen as they cooked dinner. They were happy, and Kyoya always looked so breathtaking with a genuine smile on his lips, his soft cheeks a lovely pink. Kaoru loved how his features were so soft, so pretty; not harsh lines and gaunt like his father's.

Still, there was another reason why his face had been getting even chubbier. It seemed that Kyoya certainly didn't have the metabolism he used to, shot to pieces from far too long without eating, only to stuff his face in the privacy of his room. The boy was something of a glutton anyway, not that enjoying food was a crime, but his rail-thin frame was certainly something of the past.

He loved it. He unashamedly loved it, because that warm chub signified his want to keep him fed enough. He was healthier than he'd been in high school, his lower ribs poking from his skin and his hip bones creating a valley when he lay down. He was always cold, his joints hurt, but that was gone now. He was nowhere near obese, just delightfully plush.

However, it seemed either Mr Observant didn't notice how the weight gain affected him, or he just liked torturing Kaoru. Admittedly, they were both kinky shits, but even Kaoru himself hadn't noticed this one in particular until very recently.

Kyoya lay on the coach, a book in his hand and legs crossed at the ankles, looking very prim and proper... But the shirt and the trousers were what drew his attention, a beautiful contradiction to the rest of the image his boyfriend cut. The shirt was too tight, riding up a bit over Kyoya's belly and nearly straining at the seams. Of course it was, Kyoya used to be a small, but now he was at very least the bigger end of a medium. If not bigger.

The thought made something warm pool far too pleasantly at the bottom of his gut, his designer jeans feeling a bit too tight. It wasn't like they hid anything, either.

But speaking of trousers that were too tight, Kyoya's were unbuttoned. It was sloppy, some of his gut exposed and all too tempting. It was something Kyoya Ootori wasn't meant to be, and it was so fucking attractive. God, he was a weirdo. But he couldn't help it, he wanted to see Kyoya in one of his old button-ups, everything straining over his beautiful belly. Maybe he'd even pop some buttons. Or… he wouldn't be able to do them up.

"Are you alright, Kaoru?" Came the concerned voice of his boyfriend, and Kaoru couldn't help but blush even deeper when he took in how Kyoya's stomach just brushed his thick thighs when he sat up. He squirmed a little, thinking about Kyoya's plump ass and the finger-shaped bruises that looked so delectable on his wide hips and thighs.

"I… Uh…" He stammered, eyes unable to move from that adorable, sexy muffin-top.

Kyoya's smile became a little more toothy, more flirtatious, and he batted his eyelashes at Kaoru. "See something you like?" He teased, pushing himself to his feet and closing the distance between them, wrapping his arms around Kaoru's shoulders. He pecked his cheek, his warm chub pressing against Kaoru's more muscular frame, before whispering in his ear, "I know."

"You ass," Kaoru groaned, his own arms wrapping around Kyoya's doughy waist, hands resting on that plush backside of his, "You could've had some mercy on me, Jesus. I mean, you laying there in your too small clothes, looking way too hot for your own good…"

A thought hit him then, and Kaoru snuck a look at Kyoya's trousers once more. The button seemed rather far from the hole, the zip not even partially done up, his belly overhanging a bit. Maybe he was slightly more chubby than Kaoru initially thought. Still, there was something he wanted to see…

"Want some help?" Kyoya teased, voice lilting as he cupped the bulge in Kaoru's jeans, causing him to curse under his breath. A shudder went through his frame, hopelessly turned on, but no. Not yet.

"A-actually…" He began, stepping back from Kyoya's hand despite how good it felt, "Can you… do those up, at all?"

Kyoya raised a quizzical eyebrow at him, before it seemed to click into place. His chubby cheeks turned a delightful shade of red, and he put a hand on his stomach before admitting, "Barely. They're rather tight…"

"Wanna… Pop a button for me?" He inquired, embarrassed but sure he wouldn't be rejected for this. Kyoya himself had confessed to weirder, after all. But there was something delightful in the way Kyoya smiled, taking his hand and leading them through to the bedroom. Kaoru would admit to being incredibly excited, not to mention glad that this was so okay with his wonderful boyfriend, or that he… agreed so readily.

Kyoya had to lay down on the bed to close the trousers. He had to wriggle, that gorgeous flab bouncing, and even had to breathe in a bit. The zip wouldn't go at all, but that was okay. He just wanted to see that gorgeous, sexy fat break through that strained waistband. After all, the seams of Kyoya's inner thighs seemed ready to give way any moment, and they'd certainly have to be thrown out. Might as well dispose of them in style.

His boyfriend just about managed to sit up, even if the sharp cut in of the waistband looked rather uncomfortable, and Kaoru just watched – spellbound. The soft rolls Kyoya had gained hung over the trousers, so soft and inviting, but the best was yet to come.

Kyoya finally let his stomach relax, and there was almost an audible strain on the fabric. It wasn't quite there, but he knew it wouldn't take much. So, with a wink, Kyoya pushed out his gut just a little. The sudden lack of restriction was a rush, his belly pushing the useless fabric out of the way and the button laying somewhere across the room. This was… actually kind of hot. He knew Kaoru was into it, but he was rather indifferent to it all.

A searing kiss was pressed to his lips as Kaoru pushed him onto the bed, straddling his fat thighs and feeling that wonderful, button-popping belly pressed up against him.

"Do you want me to ride you? Feel how big and soft you're getting beneath me…?" Kaoru asked between those needy kisses and hands groping at his fat rolls, "Or do you want to be on all fours, so I can put some bruises on those wide hips?"

This was definitely going to turn into a thing…

A/N: Prompts are more than encouraged, guys. Go ahead ;)