New maid Momoka arrives at the mansion, but the master is absent. Following instructions, she begins her duties, yet constantly slips into fantasy. Scenes unfold featuring masturbation with a vibrator, blowjob in a naked apron, servile sex, titty fuck on the stairs, and even a threesome with the master and a guest. In truth, this mansion is a haunted house inhabited by the spirit of a man who died on his stomach. Before climaxing, she comes face to face with the master's ghost, leading to intense eroticism and explosive big-tit service.