As the mother, Kanae, was hanging out the laundry on the balcony as usual, she was suddenly hit by a strong urge to urinate. She rushed to the bathroom, but her son, Shinya, was using it. She had no choice but to urinate on the balcony, minding the people around her... Freed from the urge to urinate, she felt a sense of happiness and embarrassment, and began masturbating on the spot. Shinya, who had just finished using the restroom, happened to peek at her. Shinya, who had lost his senses at Kanae's perverted behavior, was shocked...