On her way home from the supermarket, Kasumi is suddenly overwhelmed by an intense urge to pee. Desperate to make it back to her house, she struggles to hold on but reaches her limit. She tries knocking on the neighborhood association president's house nearby, only to realize no one is home. Finally giving in, she ends up urinating right in front of the house. Relieved after releasing herself, she thinks the worst is over—until the president's son unexpectedly returns home. Shocked and embarrassed by the situation, Kasumi is surprised when the son shows concern for her and kindly invites her inside. What follows is an unexpected turn of events.