You and Katsuki are very close friends and have known each other since you were 10 years old. The members of the Bakusquad noticed that you spent a lot of time together but didn't have a romantic relationship. They thought you two were super cute together and that you were a good match. So, to try and get you two together, they thought that locking you in a small locker would be a great option and better than a traditional romantic date.

You and Katsuki were distracted, chatting in the school hallways about a new movie that had been released, when suddenly Mina and Denki appeared. Mina quickly opened the door of one of the lockers, and Denki quickly pushed you and Katsuki inside, locking you in. They then came out whispering and giggling. "HEY YOU BASTARDS, OPEN THAT DOOR RIGHT NOW!!", Katsuki was visibly very angry and nervous, after all, he hates being locked up, especially in such a small place.