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If you had asked Katsuki in high school whether his talents with make-up would ever come in handy, he would have scoffed and rolled his eyes.
It was a necessary evil in middle school, when even the great Bakugou Katsuki had to admit he took a hit every once in a while during a schoolyard fight. Since he couldn't have his parents finding out and grounding him, he quickly built up his skills with an arsenal of concealers and foundations. And - as with anything else - he excelled at it.
As much as Katsuki regrets and has atoned for his days as a hot-headed bully, he finds himself grateful for this particular skill he acquired as a result.
Not that he's covering up bruises from any fights he gets into these days. Hell no - He wears every mark from his battles with villains as a badge of honor
These, though. These are just for him and Eijirou.
Katsuki smiles to himself as he touches the most recent mark - a clear outline of teeth around a sensitive bruise where shoulder meets neck.
---
It didn't take them long to figure out, once they got together, just how much he likes Eijirou's teeth on him. It was an accident at first, really. A too-hard nip at his lower lip when they were making out.
Eijirou had pulled back quickly at Katsuki's resulting gasp, eyes searching for any sign of injury. Once he took in the flush Katsuki could feel rising to his cheeks, the way his eyes had widened at the shock of arousal, Eijirou's grin had turned wolfish.
"Did you like that?" He had murmured, tone both teasing and deep with arousal.
Katsuki was torn between his impulse to snap back at being teased and the urge to submit .
Eijirou had taken advantage of his hesitation to wrap a hand around the back of his head, tugging experimentally at the hair there, and pull him in for another kiss.
This time the bite was intentional, a tongue swiping across his bottom lip before it was replaced with sharp teeth that bit down just hard enough to sting. Katsuki had gasped yet again, an involuntary shudder coursing through his body.
Eijirou had smiled into the kiss then, never letting his teeth leave Katsuki's bottom lip as he tightened the hand in his hair.
---
It was a shock to both of them at first, how much Katsuki enjoyed giving up control, how much Eijirou enjoyed taking it.
But, horny nineteen year olds as they were, it didn't take long before Eijirou had explored nearly every inch of Katsuki's body with his teeth. Had figured out just how hard to pull his hair to get him to bare the sensitive skin of his neck. Had identified the spots where the scrape and sting of teeth would cause an involuntary twitch of his hips, a fine tremble in the muscle of his thigh. And Katsuki loved every minute of it.
Four years later and the thrill hasn't faded a bit. Katsuki still loves the feeling of Eijirou's teeth on him every chance he gets. He delights in the reminders he gets to carry with him, the bite marks and bruises left on his pale skin. And they're not always pretty - purples and red fading into ugly yellows - but he loves them anyway. Loves the way Eijirou will take them in from across a room (covered up or not) and flash him a sharp-toothed, possessive grin. Loves the unspoken way it connects them to one another.
So Katsuki, more often than not, finds himself incorporating concealer into his morning routine. He's got it down to a science at this point, which base colors work for which stages of healing hickey, how to fade a spot of foundation into the rest of his skin.
He learned pretty quickly that waterproof makeup was the only way to go, especially for a hardworking hero whose quirk depends on his sweat. (And he's still got a grudge against Denki for his teasing comments the day of that particular discovery, but Eijirou would probably be angry if Katsuki exploded his best friend.)
Eijirou joins him in their bathroom halfway through his make-up process, pressing a kiss to his temple and smiling at him in the mirror, just a little too smug for Katsuki's liking.
He rolls his eyes. "You know, you could at least try to aim for spots my hero costume covers. Fucker." It's a well-worn argument at this point.
Eijirou hums, considering, "I could. But where's the fun in that?"
"Tch" Katsuki can only scoff, knowing the fond smile on his face betrays his affection for the other man.
They go about their individual routines side by side, as they always do. Eijirou hip-checking Katsuki as he reaches for his hairbrush, Katsuki shouldering Eijirou away from the mirror so that he can brush his teeth. He finishes first and goes to exit the bathroom, only to be caught and turned around by a hand on his shoulder.
"Oh, sorry, one more thing," Eijirou tells him, smile bright as he pulls Katsuki in for a kiss.
He lets himself sink into it, the warmth of his partner's embrace, the comfort of mornings together in their home. But when the kiss ultimately deepens, he presses his hands firmly against the other man's chest. "No making us late, Ei. We have work to get to, come on."
Eijirou lets himself be pushed away and heaves an over-dramatic sigh. "Fine," he says, leaning in to press a quick kiss against Katsuki's lips. "Later?"
Katsuki can't help but smile at the dumbass he gets to call his. "Yeah, yeah. Later."
He's looking forward to it.