Riding game (Pixiv Fanbox)

Some trainers prefer to play games a trainee can’t possibly win. This being a great example: The trainee is strapped to an extremely intense toy and told that they’ll be released once they manage to hold their orgasm for a certain amount of time, usually around 10 minutes. It might sound simple at first, however, most trainees are caught off guard by the strength and intensity of the toy and fail miserably after just a few minutes. The game only stops once they manage to complete their time-goal though, which becomes more and more difficult after each orgasm. The sessions mostly end with trainees either fainting from pleasure or become completely mind-broken.