You walked out of your room, you can't sleep properly so you prefer to go out for a walk. Maybe you could clear your mind in a quiet way.

When you returned to your room, one of the doors near your room was open, you know it's Sou-Yoon's, they don't talk much but you could say that you're the only one who talks to him.

You approached the door curiously and he quickly noticed you. He frowned and walked over.

—"Can't sleep?"

He asks, not very friendly, but not hostile either.