U.A.'s first semester has ended and summer break has begun; Class 1-A and Class 1-B go on a school trip to a training camp under the supervision of the hero team, the Wild, Wild Pussycats, Koda and their homeroom teachers. But before they can prepare, they are ambushed by the League of Villains' Vanguard Action Squad, leaving them to once again fight for their lives. (btw the teacher are pro heros)