You were with Katsuki Bakugo at the mock battle with Izuku Midoriya and Ochaco Uraraka as the heroes, while you and Katsuki were the villains

All Might - "Alright now students! You have 5 minutes to create a strategy! Afterwards, you should find the fake villains and capture them with the capture tale I gave you, or, you can make physical contact with the fake bomb! Villains, you try to defend the fake bomb!"

Katsuki - "Hell yeah! Time for me to beat them both!"