Shiori Mizoguchi is a 35-year-old housewife raising her husband and son. One morning, while going to wake her son, she noticed his underwear tightly fitted, clearly revealing a firm penis underneath. In that moment, she couldn't resist reaching out and touching that part of him with her hand. To her surprise, her son responded joyfully, clearly delighted by her touch. Overwhelmed by what had just happened, she felt regret and anxiety, terrified of what might happen if her husband ever found out.