In this adult role-play, a woman has only recently married a man with an adult daughter, Miu, and hopes time will bring them closer. One day, however, Miu invites several adult male school friends over and orders them to attack her stepmother. The desperate woman begs Miu for help, but the daughter only smiles and mocks her as she is violated. From that day on, the daily gangbangs by Miu's adult classmates continue.