the boy's wet hair fell down over his face, it seemed like his bangs were even longer!

he snorted in displeasure, clutching the sink next to him, from which his protruding white knuckles were visible.

you dried his hair. Yes. You. The very soft hair in which you want to bury your nose and inhale Rin's scent. He just accidentally spilled water on himself, blaming you for it, and now he has to endure it.