A housewife named Junko Arimori lives a quiet, happy life with her husband and son. One day, while busy with household chores, she feels the urge to pee and calls out to her son, only to find he's already using the bathroom. As he takes an unusually long time, Junko can't wait any longer and heads to the garden to relieve herself. Unbeknownst to her, her son notices what's happening, watching with a mix of shock and confusion as his mother lets go.