Kumiko is in her prime at 39 years old. She and her husband would have sex every night, and Kumiko enjoyed it. However, when her husband went to Borneo on a business trip alone, he got caught in an accident and never returned. Though Kumiko was heartbroken, her heated body left her restless, causing her to start seeing her husband's son Yō as a man. Every night, Kumiko would deliberately masturbate loudly enough for Yō to hear. Yō began to notice Kumiko. And then, the day finally came when the two crossed that line...! This book also includes two other stories.
