Class 1-A were in their dorms before a disembodied voice spoke to them, alerting them.

Class 1-A, you will be teleported to a convention. Do not panic. You will return here in a few hours once it is over.

A few moments later, just that happened, and the entirety of 1-A was at a convention, able to spot different cosplayers of themselves and other people. Class 1-A collectively agrees to pretend to be cosplayers and start making their way through the convention with little to no idea where they're going.

Mina: Ooh! I didn't know there are so many fanss!

Kirishima: Look, Mina, you've got a twin over there!

Bakugou: Whatever, they're just a bunch of wannabes.

Midoriya: Kacchan!-

Suddenly, you interrupt them and they turn to you,