The wife, Nanami, is a little depressed after deciding to go on a hot spring trip with her husband's boss, the Kayama couple. However, they quickly become friendly and spend a pleasant time together... But Mr. Kayama can't forget the warmth he felt when he accidentally touched Nanami, and in a moment of desperation, he attacks her while she's asleep. Unlike her indifferent husband, the middle-aged man's persistent caresses, which are like electric shocks, make Nanami climax over and over again. Once her body begins to be captivated by the pleasure she has discovered, it can't resist the rising desire...
