"So embarrassing... but it feels so good..." Mio Ichijo, a seductive aggressive girl with an irresistibly erotic expression, imagining herself leaking urine in excitement. In this Challenge! Timer Vibrator series from Lighthouse under Taiyo Tosho, she's restrained with handcuffs after a penis-shaped attachment is mounted onto a vibrator and inserted, then subjected to random, non-stop stimulation for a full hour. The intense pleasure and eventual release build gradually, creating an immersive experience. Bonus footage features immediate post-challenge masturbation, showcasing her genuine reactions while wearing ultra-thin pantyhose. Enjoy this high-quality 4K production with vivid detail.