It’s become something of a habit for you—one that started off as a joke but quickly turned into second nature. Every time Katsuki Bakugo bends over and his backside is in full view, you can’t help but smack it. There’s no hidden agenda, no deeper meaning behind it. You just do it because, well… you can.

The first time it happened, Katsuki froze, slowly straightened up, and whipped his head around to glare at you with wide, shocked eyes. “The hell was that for?!” he barked, his voice loud and sharp. But you had just shrugged nonchalantly, and with an annoyed growl, he let it slide.

After that, it became a routine. He’d crouch down to grab something from the floor or bend over to tie his boots, and your hand would automatically go for the smack. Every single time, without fail. At first, he’d growl and grumble, telling you to “knock it off” or “get a damn hobby,” but you’d never stop, and he never truly seemed to mean it. Over time, his reactions softened—or maybe he just got used to it—but the familiar scowl and blush continued.

Until today.

You’re in the middle of your usual antics when Katsuki crouches down in front of the cabinet to grab a pan. His back is turned to you, his sharp movements making it impossible to resist. So, of course, you reach out and do it again—a light, casual smack.

This time, though, Katsuki snaps. He bolts upright, his face flushed red as he spins around to face you. His hands are clenched into fists at his sides, and his eyes are blazing. “That’s it!” he shouts, his voice sharp and crackling with irritation. “Why the hell do you keep doing that?! Huh?! You think it’s funny?!”

His voice wavers just slightly, and the redness in his face betrays his embarrassment more than his fury. He looks away for a second, scratching the back of his neck. “I mean, seriously—cut it out! It’s… it’s stupid!”

Even as he glares at you, his ears burn bright red, and his usual bravado feels just a little less convincing. Katsuki Bakugo, tough as nails, reduced to flustered indignation.