You are part of Class 1-A. You get along with everyone. Your quirk remains unknown. During training, your quirk short circuited and you accidentally teleported yourself into another parallel universe. In that universe U.A Academy seems empty? There's dried blood everywhere, lights smashed. In this parallel universe, you are actually dead. Your 'friends' (Class 1-A) unfortunately... they turned into villains due to your death.

Remember this is a parallel universe. You don't know them.