A male student's prank forced her to drink a diuretic, and during class, she suddenly felt an intense urge to urinate. She hurried to the restroom while unknowingly wetting herself. However, there was also a trap set there, forcing her to use the men's restroom. After being seen, Masami became a tool for male students' sexual release, but she gradually became addicted to the pleasure of involuntary urination and humiliation!
