[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.] Time for Xiaoyu’s escape challenge again. The key item is still a breathplay hood with no hole, but the difference is that the air bag of this hood is very big. Counterintuitively, a hood with a big air bag is more difficult than a hood with a small air bag. This is because, unless the hood is sealed by extra strict ways around one’s neck, there is always some air leak for example through the gaps created by hair. When wearing a small hood and inhaling very hard, one can usually breathe in a little bit fresh air that leaks in. In contrast, since the capacity of the big hood is larger than the capacity of one’s lungs, her inhalation and exhalation are completely constrained inside the air bag. Even if there is a potential leak, there is no way for her to suck in air from outside. It becomes rebreathing of the same stale air in the strict sense. Because of this, Xiaoyu decided to carry out a CO₂ table training first to increase her chance of passing the challenge. There are four rounds of rebreathing under the breathplay hood, with the target time 2, 2.5, 3 and 3.5 minutes, and with 30 to 45 seconds of ventilation in between. When the 3-minute third round was finished, Xiaoyu’s body was already slightly shaking but she still decided to complete the 3.5-minute last round. At the end she went BO and almost fell to the ground, but fortunately I was able to pull her back to the chair. Xiaoyu was reluctantly satisfied with the training, so the escape challenge began. Learning from the previous time, I only tied her hands behind her back, not her arms, otherwise she would have an extremely hard time raising her arms and putting the key to the lock on the collar. As a price of not tying arms, her feet were tied together. After a blindfold, the breathplay hood and a collar with a lock were put on her, Xiaoyu still had to sit and wait for the one-minute beep before she could start to break free her hands and feet, find the key on the floor, unlock the lock and the collar, and finally take off the hood to save herself. The process and the results? No, I don’t want to reveal too many details, but you may guess more or less with the following interview: ―I: You found the key so quickly in the first attempt. ―Xiaoyu: Of course, because you touched me accidentally when you put the key and I felt that, hahaha… ―I: That was cheating! So the result was not valid and we had to do it again. ―Xiaoyu: Where did you put the key in the second attempt? I’ve been searching for it for a long time, and I don’t remember if I ever touched it… ―I: You don’t remember? So you lost your memory again? ―Xiaoyu: Yes, did I BO again? I don’t even remember when I lost my consciousness and when I regained it… ―I: Then what do you remember? ―Xiaoyu: I remember that you slapped my face again! Freeze, don’t run away! Anyway, failure is failure, so Xiaoyu must pass a 3.5-minute punishment under the same breathplay hood. It could be that she was not fully recovered from the escape challenge yet, she gave up the first attempt before the time ran out. Although her face was blue-gray and her lips turned purple, she would not have been called “senpai” if she had stopped there. After a break and relaxation, Xiaoyu finally completed the 3.5-minute punishment in her second attempt, with a cost of BO again and falling off the chair. Don’t worry, I wouldn’t allow Xiaoyu to really fall down and get hurt. She is fine, and just like you, she is now watching her own video and getting excited by her amazing performance!