Mother Kanae was hanging laundry on the balcony as usual when she was suddenly overcome by an intense urge to pee. Rushing toward the bathroom, she found her son Shinya already using it, leaving her no choice but to relieve herself right there on the balcony. Overwhelmed by the mix of relief and shame, arousal surged through her and she began masturbating on the spot. Shinya, discovering her in the act, lost all sense of reason and gave in to his impulses. The scene captures his descent into obsession, drawn helplessly into Kanae's perverse world.