For Akari's birthday, I gave her a special gift: an ultra-large vibrator called the "Big Bang Rotor," capable of making her climax with power strong enough to shatter glass, while also expertly teasing her. While she was on a business trip, I arranged a luxury hotel massage and secretly turned the device on during the session. I activated it again at a high-end bar. Introducing a new weapon—the advanced rotor—I brought Akari to repeated orgasms in private. Finally, I involved customers at the bar, turning it into a full-scale perverted sex show.