[This video was shot with full consent of the model. The model was assured that she can pause or terminate the shooting and be released from any risky circumstances at any moment, by using predefined signals including but not limited to safe-words and safe-moves. WARNING: The video features performance by either professionals or under the supervision of professionals. Do not attempt to recreate any actions similar to the ones that appear in this video. No solo breathplay. NEVER.] This is a custom video. Xiaoyu-senpai is completely encased in black PVC electrical tape, mummified from head to toe with even her head entirely wrapped, leaving only a ventilation pipe in front of her mouth. However, once this ventilation pipe is capped, her only airway is completely blocked. Inside the mummification, a magic wand is fixed between her legs and switched on all the time. In the first half of the session, we use the ventilation pipe cap and a plastic bag respectively to restrict Xiaoyu’s breathing. The cap immediately cuts off her air supply, while the plastic bag slowly leads her through oxygen depletion and CO2 buildup. Either way, bound tightly in mummification, Xiaoyu can only writhe, arch her back, and roll around helplessly, completely unable to free herself. In the second half, we wanted to see Xiaoyu’s extreme reaction. We first use extra tape to pull her head and feet close together, turning her into a reverse bow posture. Then, we seal the ventilation pipe cap and start the timer. In this state, Xiaoyu begins to beg for mercy and stops the test after just 1 minute and 8 seconds. Of course, a test where she can call for a stop on her own terms will obviously never push her to her true limit. Next, I tell Xiaoyu that she needs to repeat the breath holding time she just achieved, and I set a 1-minute-8-second countdown for her. In reality, however, every time the countdown reaches zero, I continue to manually increase the duration—gradually adding an extra 20 to 30 seconds. By using this dual-countdown deception, I slowly push her toward her true limit…