What happens when a timer-programmed vibrator is attached to a girl's underwear, delivering continuous vibrations with intervals of one to two minutes, gradually increasing in duration? As time progresses—five, six, ten minutes—the mix of discomfort and pleasure intensifies, ultimately driving them into an uncontrollable state. Three girls take on this challenge! Mizusawa Tsugumi, who looks pure but has a strong sexual curiosity; Himeka Takahoshi, who is always aroused; and Aimi Otosaki, who climaxes so intensely she ends up losing control. Witness their individual reactions unfold in this highly stimulating scenario!