spoiler
the mc was trying to "cure" ml trauma by having the ml yearned for him. mc was lying about going out or even going out of town iirc but he was sitting outside the bedroom door, listening to ml's having episode. the purpose of the mc doing this because he wanted the ml to break free from the confinement himself, yearning for the outside word and things he could do with mc and realizing that outside world is not so bad with mc

my favorite arc is here!!