Attach a timer-programmed vibrator to a girl's vagina, gradually increasing the time with intervals of 1 to 2 minutes for continuous vibration. 5 minutes...6 minutes...10 minutes...As the vibration time increases, the dangerous threat intensifies. The pure-faced hot-blooded slut 'さとみ', the real sex monster 'ゆい', and the nearly fainting orgasm-crazy girl 'りな' are all recorded. A new fixed camera element has been added to observe orgasms！！
