One day, Matsu Sumire, the teacher at her son's kindergarten, comes for a home visit. Everything seems normal at first, but things quickly take a twisted turn. She's slipped a sleeping pill, leaving her consciousness blurred, then subjected to erotic massage. In a bizarre twist, she's told the man's penis was bitten by a snake, forcing her to suck out the poison. Dressed in a yukata and hung from a laundry pole, the helpless teacher is teased and molested at will—spied on in the bathroom, and eventually, unable to resist, engages in outdoor sex. This stunning, big-breasted teacher is exploited in every lewd way imaginable, all depicted through eerie and deeply sexual developments.