Introduced by an acquaintance, Yuriko (Rumi Mochizuki) visits an esthetic salon. Her treatment is performed by therapist Okamoto, who carefully stimulates her sensitive body, leaving her mind and body burning with heat even after returning home. When Yuriko visits again, she receives even bolder massage techniques from Okamoto. Though loved by her husband, she has been suffering from a sexless marriage, and lured by pleasure, she eventually accepts Okamoto's cock. Telling herself it's just a one-time mistake, she gradually finds her body responding uncontrollably to his touch...