Nagisa, who has a slightly timid side, showcases her incredibly sensitive body that reacts even when the vibrator is not running. In this installment of the Challenge! Timer Vibrator series from Taiyo Tosho's Lighthouse label, a penis-shaped attachment is mounted on the vibrator, inserted and secured inside her while she's bound with handcuffs. Continuous, random vibrations are delivered non-stop, creating an intense, top-tier extermination experience. As a bonus, the special feature captures Nagisa immediately after the challenge, masturbating in her school swimsuit—inviting you into an erotic world far removed from everyday life.