Hensokukei Quadrangle

High school delinquent Eiji Maki is consumed by guilt when he meets Kotoha Chino again years after his behavior helped make her a target for other delinquents. Back then, she had treated him kindly, but the attack she suffered seemed to change her for the worse. A mysterious, scantily clad woman appears and offers Eiji a chance to return to the past and make things right. He accepts, only to discover that Kotoha was carrying painful secrets of her own—and that someone else may also be traveling through time to alter what happened.