After waking up to a regretful adult life, I mysteriously find myself back in junior high, reliving my past. Armed with adult wisdom and charm, I transform from a background character to the hero of my youth. By rewriting my history, I befriend Chigasaki, save classmates, and confront the unresolved mystery of a pivotal summer with my first love, Akimiya Hazumi, who held the key to my future.