When her mother, who she lived with, suddenly fell ill, Mio, a female college student, ended up working as a maid in a wealthy mansion to pay for the high medical expenses. However, the place turned out to be the home of two cosplay-obsessed beasts, a pedophile father and his mother-complex son... Every day, the two of them would raise her hourly wage and make her wear erotic costumes and torture her. They would masturbate in a sailor uniform, use a bloomer DID vibrator, have a heavenly maid irama, have sex with a mother in a dress and cum inside her, torture her nose with a rope and a crotch whip, and more, as they would dress her up and then roughly strip her down in a hell of cosplay training.