Nanami Kawakami's retirement commemorative release—a classic female-teacher rape story. I could not believe Nanami was marrying that bastard teacher Yamazaki. Worse, she planned to leave the school when we graduated, even though she once promised we would work together after I became a teacher. Was that all a lie? I will never forgive her. On graduation day, I decide to give Nanami a memory she will carry forever by brutally gang-raping her.