[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.] Xiaomeng appears in a full-body red latex catsuit, complemented by high heels. The suit features only a mouth opening, completely sealing off her vision and nasal breathing. Her crotch zipper is slightly undone, revealing a metal anal hook protruding, hinting that Xiaomeng’s interior has already been partially invaded by implements. The first challenge is a brand-new device: the “One Bar Prison.” As the bar ascends, its dildo top precisely penetrates Xiaomeng’s vagina and locks into place, forming a prison defined by one bar, not bars. With her feet already in high heels, Xiaomeng cannot relieve the pressure of being impaled by tiptoeing, nor can she lift herself to escape; she has to balance on the bar. To make matters worse, a vibrator mounted on the bar continuously targets her private parts, its incessant stimulation almost debilitating Xiaomeng as she struggles to maintain her stance. The breathplay challenge also escalates dramatically: a latex hood with only a single 1 mm breathing hole. While theoretically offering slightly more ventilation than the pinhole hoods used in the past, it proves utterly lethal for Xiaomeng in her current state. Nailed firmly to the bar from below, she dares not exert herself for deep breaths, as any violent upper body movement would aggravate the internal pain. She can only struggle desperately between lack of air and the fear of being torn, quickly reaching her limits. Finally, I hand her a hex key to attempt self-rescue, but with her eyes obscured and bending over intensifying the internal agony, this is an almost impossible task, which she barely completes with my assistance. To thoroughly test the full power of the 1mm single-hole restriction, the next segment transitions Xiaomeng to a new restraint lounge. During an initial trial in a relaxed state, as she arduously lifts the hood with her mittened hands, her lips already display a breathtaking purplish-blue hue. Then, as she enters multiple rounds of formal restraint challenges, with fresh air relentlessly denied, Xiaomeng swiftly shifts from initial calm to panic, followed by uncontrolled, violent struggles and screams. Under the domination of that one millimeter, her body unleashes astonishing survival instincts; even the heavy restraint lounge lifts off the ground with her frantic thrashing. Each time her lips turn purple from extreme oxygen deprivation, it records the cruelty and climax of this ultimate challenge.