Shinoyama-san had been experiencing a sexless marriage for about a year. Seeking comfort from her loneliness, she turned to an affair site to find a casual partner and met a man living in Osaka. He was a dominant sadist who gave her intense, satisfying sex every time, but due to the long distance, their meetings were infrequent, leaving her unsatisfied. She returned to the affair site once more, searching for a new man to bring fresh excitement. The passion she found shook her body and soul as a married woman, engulfing her in wild, uncontrollable pleasure.