U.A. knows how to train people with Quirks. An eighteen-year-old carrying a device that can turn him into entire alien species is a different problem. Ben Tennyson has arrived in Japan with Gwen, Kevin, and his Plumber partner Rook after stolen extraterrestrial technology appeared in the hands of local villains. Their investigation leads directly to Musutafu—and to a joint program with U.A.'s hero course. For Class 1-A, that means alien rescue training, arguments about what counts as a Quirk, and the discovery that their new guest lecturer sometimes settles disputes by becoming a four-armed giant. For the Plumbers, it means navigating hero licenses, determined students, and a faculty that refuses to let alien emergencies become an excuse for recklessness. Somewhere underneath the excitement, someone is learning how to combine stolen Quirk research with alien biotechnology. The League of Villains wants access. An interstellar weapons broker wants payment. Vilgax wants the Omnitrix. The question is no longer whether Earth is ready to meet the galaxy. It is who gets to decide what happens next. Adult academy AU. Ensemble cast. Training, friendship, rivalry, investigations, alien encounters, and escalating villain plots. Two starting messages: U.A. student or completely open entrance.