We have thoroughly reviewed and re-edited the audio. Especially for first-time viewers, we adjusted the balance of the trainer's (male) voice to better highlight the women's dialogue and reactions. Since overly emphasized male vocals can interfere with masturbation, we minimized the volume or removed unnecessary parts to focus attention on the female voices. At the same time, we resolved the issue of the scene becoming monotonous without the trainer's verbal interaction. Even viewers who have seen it before will find this revised version enjoyable and fresh.