Forgive my ignorance but what does OVA mean? Also how did they not notice after they got out how *quiet* it was. That should've been the first clue that something was up with Bakugo. Granted he can be quiet when he wants to be but considering how fired up he was, I doubt he would've chosen that moment to be calm and relaxed. He can be rather surprising though.
Deku: Kachon Raven Todoroki! Raven: Midoryia Bakugo: OH Great what the hell are you doing here you damn nerd!! Raven: Bakugo language. Todoroki: what are we gonna do Raven: guys come on.