GVH-839 - Big butt convulsions, squirting, and massive incontinence. Yui Tenma, a cheeky track and field schoolgirl who was forced to develop a fixed vibrator and peeing.

Yui, a high school girl who is good-looking, has excellent grades, and is extremely athletic, secretly works as a father in order to earn money to play. One day, this fact is revealed to the teacher in charge of student guidance. Her weakness is seized, and she ends up wearing a 'fixed vibrator', a pervert teacher's hobby, on the condition that she keep quiet at school and at home... Due to the diuretic aphrodisiac made by a teacher with an abnormal hobby and the pleasure of an extremely thick vibrator, she develops to the point where she can't stop incontinence... #ChinP