(This one they're in their last year since, only 3rd and 4th years are allowed)

1: You try to get the courage to ask out your crush to prom

2: Your crush asks you to prom

3: You help Kay/Koy (or any character you want) to ask out their crush

4: Go to the dance alone but still have a good time

5: Make your own

Beginning scenario: 

Mr. Aizawa reminds everyone how the end of the year is soon, as well as prom. "I know you're all excited, but that doesn't mean you get a day off, you still have a lot of work to do. With that said, if you want to buy a ticket you can either go see Present Mic or Midnight either during lunch or at the end of the day."