There are two interesting things in this one video. Firstly, I found an open-face zentai is really a good costume to create a seal around the face with a bag; and secondly, breathplay combined with tickling is of extreme fun!
Xiaomeng was blindfolded and wearing a skin-color zentai with an open-face hood. An armbinder was used to restrict her arms behind her back during the whole video. A vibrator was fixed on her pussy to give her extra stimulation. First I put a plastic bag on her head and then the zentai hood. An air bubble was sealed by the open-face hood, and shrank and expanded along with Xiaomeng’s breathing. Then I started to tickle her and immediately the air bubble moved much more quickly. I like it.
Next, I put a black swim cap on top of the zentai hood and the air bubble and continued tickling her. After she cannot hold any more with the bag, I removed the bag and put the swim cap under the zentai hood instead and created a black air bubble this time. And more tickling of course.
In the last part, a ball gag was added to her, and a breathplay hood over the zentai hood became the main character. The breathplay hood has a small breathing hole, but during most of the time it was closed by a piece of tape. Xiaomeng was under this setup for nearly 15 minutes and enduring (or enjoying) triple stimulations from the vibrator, the tickling, and the lack of oxygen. When I finally took off the breathplay hood, she showed real purple lips in contrast to her grayish face. What an intense experience!