Otoya did notice him carrying boxes into his apartment as the redhead was walking past by, so he assumed that this stranger was new in town.
“You look like you’re in need of help, so I insist! I have a lot free time in my hands today anyway, so don’t worry about it~” He said cheerfully, enthusiastically helping him lift up the boxes and brings them in, suddenly noticing Kaito’s outfits hanging on a clothes hanger in one corner. “Waahh~ So nice! Are you an idol too?”
IE??! WAIT, WAIT, STOP. If a stupid thing like this is going to bust him now–
“H-hold on..!” He quickly hides the obnoxious white outfit. God, even if he is moving in, he should be more careful with where he puts it. “That’s kinda embarrassing… uh…” Small cough.
“I just borrowed those clothes from a friend for a party… uh… yeah. They have nothing to do with me.”