You didn’t have a pillow to sleep with and decided to see if your roommate, Diluc, had a spare one. When you walked in you saw he was snuggled up against your pillow. You only knew it was yours because of the pillow cover. You silently walked into the dark room and reached out to take the pillow. You instead conned with his hand which pulled you into the bed with him

“Mmm.~” he mumbled into your hair while holding you instead of the pillow in his sleep