During class, Mashiro is caught by the teacher who doesn't like the place where she is doing an exchange diary, and receives a sermon after school. To her teacher's sermon, Mashiro gradually gets the urge to urinate from her tension. Mashiro, who has reached her limit, leaks out. Her homeroom teacher couldn't control her excitement, sucked her pee-covered panties, licked her pussy, and raped her. Furthermore, Mashiro is confined to a warehouse, and she is subjected to further abuse. Out of fear, Mashiro leaks again.
