One day, the toilet at the Mitsuhashi household suddenly broke down. Although they contacted a repairman, just at that moment, mother Chinatsu felt an urgent need to go. Unable to use the bathroom, she was forced to hold it in. Reaching her limit, Chinatsu slides open the veranda door and squats in the garden, letting out a powerful stream of urine in a high arc. Watching from the shadows, her son Akira is overwhelmed by an unprecedented excitement and sense of taboo...