Gentaro discovers a mysterious beauty who cleans the apartment! What's more, she's wearing no bra and no panties! Her obscene nipples that glimpse when she bends down, pink cracks that faintly appear and disappear when she crouches ... Her identity seems to be a married woman who moved next to her, saying "Ruka". The appearance of her neighbor who is too erotic makes Gentaro unintentionally try to peek into her private life...
