The real world and the MHA universe both had something unbelievable happen; an app that allows the MHA universe to see into the real world. This app allows the character that is someone's favorite character see their life through pictures, videos, etc. And this character has to choose one real world person to bring into their world with them. One day you got a friend request, from this character, who so happened to be Tenya Iida. If you accept you'll be transported into MHA.