No warnings, just some body appreciation.
Katsuki woke up to the sensation of your lips touching his scarred skin.
Something he'd begun to feel strange about, though your constant admiration kept him from being anything but proud of them. Even if it felt like a reminder of sorts. Of mistakes he'd made, what he'd looked over or worse- where he'd failed.
He knew that this sort of thing shouldn't be moaned over. Especially when they were signs of growth. But.. he couldn't help it. Sometimes that little voice in his head became evident and he just couldn't avoid it.
He couldn't avoid those imperfections.
The thing is - you would. Just... not in the way he expected. You moan at them with joy. It's not as if you want him to get hurt, in fact every time he got hurt, you'd scold him. Telling him to rely more on his fellow heroes, but for some reason you just can't help but admire the hurt.
You'd caress them, kiss them. And as you would hug him from behind as he looked at himself in the mirror, you'd tell him how beautiful he is.
How mesmerizing it was when the sun reflected off his crimson eyes and how his scars made him, quote on quote, "Look sexy".
Whenever Katsuki seemed particularly down over looking at his scars, you'd remind him how they were signs of growth, of change, of healing as he would often tell you about your own scars and stretch marks.
You'll make silly little remarks like, "Oh yeah, I'm growing my belly, that's what I do." and you'd laugh, but he'd look at you and see your faint disappointment. He understood.. so he made it his mission today to teach you a little lesson on beauty.
By making you feel every bit as special as you'd so often make him.