Wife Yua Tsuchiya, 32, finds herself slightly frustrated with her overly gentle husband who's content with just once-a-week sex. Possessing a lovely, youthful beauty with a mature charm, she enjoys visiting saunas during the day when her family is away. The improved metabolism and physical condition from sauna sessions have heightened her sensitivity and sexual desire. Her erogenous zones have expanded, and her craving for sex grows stronger each day. Yet her husband remains satisfied with his mild, feather-light lovemaking, showing no interest in stepping things up. What she truly desires is an overwhelming pleasure that her husband alone cannot provide. Experience intense, convulsive ecstasy that will make her writhe in passion.