The story follows a 12-year-old boy named Rem who chooses to leave the party after the female hero orders him to be her sex slave. Rem returns to his hometown but is betrayed by those he thought he trusted. He wanders into a labyrinth and releases a girl named Alicia from a seal. However, after being released from the seal, Alicia calls Rem her "master", and the two form a sex slave contract.
