Erina Kimijima is a 48-year-old housewife. Her son always used to bathe after her. But recently, she noticed he was taking much longer baths than usual. Curious and suspicious, she decided to open the changing room door. There, she found her son wearing her underwear. Shocked and confused, she quickly snatched the underwear back from him. At that moment, her son's private area became exposed—an unexpected turn of events that left her stunned.