[He could say I'm friends with you, aren't I, get Katsuki heated again, but he also does genuinely like spending time with Katsuki, so that's not quite right, either. And if he's honest, he actually likes that look of surprise on Katsuki's face. He likes knowing he can surprise the other boy, even if he should maybe have realized this part by now. So instead he gathers the dishes and stands, offering Katsuki a very brief look that might in fact be a quickly hidden grin.]

You learn something new about me every day, I guess.

[He doesn't mean for that to sound as flirty as it does, honestly. But hey, at least he's heading for the sink and leaving Katsuki to steam if he'd like. And speaking of--]

If you want to use the shower, you can. And I don't mind loaning you clothes if you want some.