Attach a vibrator with timer programming to a girl's vagina, gradually increasing the time while placing intervals of 1 to 2 minutes for continuous vibration. 5 minutes, 6 minutes... 10 minutes... As the vibration time increases, the dangerous threat intensifies. G-cup Yuichan, Koyuki-chan whose pelvic dance is too lewd, and Hirochan, a girl with unparalleled transparency and purity, will experience their first SM thrill!
