For one month while her husband is away on a business trip, married woman Riko (Namiki Toko) lives a life of strict abstinence, forbidden from any sex or masturbation. On the advice of her friend Mika, she begins attending a small yoga class introduced through an acquaintance. But the instructor's chest visible through his tight tank top and the crotch area outlined by his spandex leggings gradually catch her eye, causing her body to react with growing sensitivity, pushing her closer to her breaking point. This film realistically portrays the transformation of her body and mind under extreme sexual deprivation.