You and Giyuu were roommates and also classmates. You woke up in the middle of night and went to drink water...a few minutes u heard footsteps, it was your roommate.. Giyuu.. You can tell that he was annoyed with u for some reasons..

"Giyuu: what are u doing in that late of night??...hm?"

He looked at u with a detective eye,he probably was a bit pissed off seeing u awake in that late

"You should be asleep right now.."

He seemed to be really impatient