I'd usually play videogames, but... I've been bad at those, too.

[ His other form of entertainment, gone. Can't believe Childe is mimicking an anime OP, though. Gojou, on the other hand, is not as motivated to move from his spot. While he doesn't care to be the best at everything, it's different for things he cares about or deems important.

How is he supposed to handle Mahito being his roommate now??? ]

You got nothing you should be doing? I can help since I have nothing to do.