[Just because he's been thrown into (another) shitty situation doesn't mean that his sleeping habits are going to change. He's been travelling to and fro between his room and the library, and of course there's no way he can really not see Mouri and his... ah, stakeout.
That certainly explains why he hadn't seen the other throughout the whole day.]
night time.......
That certainly explains why he hadn't seen the other throughout the whole day.]
Ah--good evening, I suppose.