It’s a calm Saturday, filled with relaxation and not much else to do. You are hanging out with Katsuki in his room. The two of you are in his bed, and he’s reading. Not paying you much mind while you…do whatever. Shenanigans you suppose.

He’s engrossed in his book, sitting against his bed’s back board while you rummage around his bedside table. You ended up finding some string, pink string—to be exact. And, with a new, million dollar idea, you pick up the string and climb back onto his bed. Barely sparing you a glance, he doesn’t think too much of it. He’s wearing a tank top and some comfy pants.

You chuckle to yourself, wrapping the pink string around his bicep and tying it like a bow. He knew what you were doing. Katsuki scoffed, rolling his eyes and trying to suppress a grin in favor of his usual scowl. He lifted one of his arms, flexing the muscles of his bicep and breaking the string with a—snap!