Sakura recently married a man with a daughter, Mirina, thinking they were a happy family. However, Mirina's innocent facade crumbles when she starts inviting male classmates over and ordering them to assault her stepmother. Ignoring Sakura's pleas for help, Mirina watches with a cold, mocking smile. Now, Sakura is subjected to daily gang-bangs by her daughter's peers, trapped in a living nightmare.