A perverted doctor targets a high school girl who visits his dental clinic. Before treatment, the high school girl is unaware and is given a diuretic, which is falsely assumed to be anesthesia. Eventually, the diuretic starts to take effect, and she feels the need to pee, and she can't hold it in any longer, so she leaks a pee. The doctor is excited by this and reaches out to her, but she is too embarrassed to refuse, so she submits to his orders and engages in pee-filled sex while her pee-filled urges won't stop.