Unable to suppress his longing for his stepmother Azusa, the son-in-law planned a family hot spring trip, determined to spend more time with her. The family reunion delighted both his wife and stepmother. Upon arriving at the inn, the stepmother headed straight for the bath. When the wife suddenly took a work call, the son-in-law seized the chance to peek at his stepmother's changing clothes. Overwhelmed by her beauty and charm far beyond his imagination, his excitement intensified. At dinner, he encouraged his wife to drink, luring her into intoxication as planned, then approached his stepmother. Despite her protests of "No," he caressed her body, and the two shared a warm, intimate moment.