Shinkalion: Change the World

Taisei Onari transfers to Shinkai Academy searching for any clue to his older sister, who vanished two years earlier. At the same time, the Unknown reappear for the first time in a decade, the mysterious enemy that prompted ERDA to develop Shinkalion robots capable of transforming from Shinkansen trains.

By chance, Taisei is discovered to have unusually high compatibility as a Shinkalion driver and is asked to enter a battle he never knew existed. His search for his sister becomes entangled with the secrets of both ERDA and the Unknown, forcing him to decide whether he will only keep chasing the past or become the kind of person capable of protecting others in the present.