Yui, a track and field club girl with excellent looks, grades, and athletic ability, was secretly doing sugar daddy work for pocket money. One day, this fact was found out by the teacher in charge of student guidance. She, having her weakness seized, ended up having to wear the 'fixed vibrator,' a fetish of the perverted teacher, on the condition that she keeps quiet at school and home... Due to the pleasure from the diuretic aphrodisiac and extra-thick vibrator made by the teacher with abnormal tastes, she ends up being developed to the point where she can't stop urinating... #dickhead
