A man suddenly moves into an all-girls share house. Unaware of the arrangement, he is shocked and met with strong resistance when the female residents confront him about his unexpected arrival. The women initially try to bully and drive him out, but as the harassment continues, they begin to enjoy it and decide to keep him not just as a roommate, but as their "completely obedient male masochist pet." As they train and dominate him, the women's relationships with each other also evolve, forming new, deeper bonds.