We called out to a female student on her way home from school and invited her to work as a part-time monitor for a newly developed sports drink, and had her drink a drink containing a super-strong diuretic made overseas! Then, we left her in a locked room behind a magic mirror and completely monitored her pee-holding! Furthermore, just before she was about to urinate, we suddenly stuck a huge dick in her bladder-filled pussy, which had been holding in her pee to the limit! Many female students were caught off guard by the sudden pleasure and climaxed!