Gentaro discovers a mysterious beauty cleaning his apartment! What's more, she's wearing no bra or panties! When she bends over, her obscene nipples peek out, and when she squats down, her pink slit peeks out... Her true identity is "Ruka," a married woman who moved in next door. With the arrival of his overly erotic neighbor, Gentaro can't help but try to peek into her private life, but...