Giant buttock spasms, massive ejaculation and incontinence, an extremely arrogant track and field high school girl, Yui Tenma, developed to the point of urinary incontinence by a fixed vibrator. GVH-839

Yui, a beautiful, academically gifted, and athletically gifted high school girl in the track and field club, secretly engages in casual sex. One day, her student counselor discovers this. Having her weakness exposed, she is forced to wear her perverted teacher's "fixed vibrator" on the condition that he won't tell the school or her family… Under the influence of a diuretic aphrodisiac created by her teacher's bizarre hobby and the intense pleasure from the extremely thick vibrator, she is driven to the point of uncontrollable incontinence…