A timer-programmed vibrator is fixed to the girl's pussy, delivering continuous stimulation with intervals of one to two minutes, gradually increasing the vibration duration. At first, the sensation feels insufficient, but as time passes, the stimulation grows stronger—five minutes, six minutes, ten minutes. As the duration keeps extending, the girl begins to crave the intervals, yet the preset timer mercilessly resumes with intense vibrations. Overwhelmed by its relentless force, she is driven further to the edge, her arousal mounting uncontrollably.