Time-Stop Class. It is a god device that can stop time, and it can be inserted or stopped at any time you want.

"What? Wait! I'm just stopping at this classroom!" What! There was a divine device in the school that could stop time freely depending on the place!! i'm usually just being imprisoned by girls in my class, but it doesn't matter if the time has stopped! I doubled my daily grudge to make it a bitter tea! touch it as much as you want, lick it in, put it out, turn it back on, stop it, get it back... You're all-you-can-go! Don't you know even if you get pregnant?