Kazuhiko's father has just recently married a beautiful young woman named Misako and he starts dreaming about his new mother all the time. One day, Misako gets lewd calls and sex toys in the mail. Kazuhiko uses this to blackmail her. Misako finds herself trapped within Kazuhiko's power and agrees to place all of his physical needs in her care. But Kazuhiko is not satisfied with just his step-mother. He has also set his eyes on Emiko, his aunt.