My school used to do this a lot
What is a lock in?: A lock-in is a party where nobody can enter or leave for a predetermined amount of time. I recommend 5:30 or 6:00 as a starting time and 10:00 or 11:00 AM as an ending time. Whatever it is, it is important that a lock-in starts too early to be an actual party and that it forces the sleepover.
Though it's not really a party, When it comes to school, students stay overnight to work on projects, homeworks and stuff
Scenario: Instead of hero training, Aizawa (Or Vlyad King if you're in 1-B or the Teacher of the Big 3 class) called you all to the class room calling upon a lock in. A night where you get locked in the school to work on your quirks or hang out or whatever and no one is aloud to leave until Morning
What happened?
