Xiaomeng was trying a completely new topic: water.
She was wearing a black zentai and went under the shower. Soon the clothes, including the hood, got completely wet, and she was forced to breathe through the wet fabric. That is a new experience to Xiaomeng. She can breathe, but with every breath there was half-mouth of water accompanied with very limited air. She must focus on inhaling only the air in her mouth and spitting water out of her mouth with each exhaling. Apparently she did not succeed in doing this in every breath and she choked on water from time to time. Her hands were fixed high to the wall so she cannot remove the hood herself and was fully into the water world without any escape.
The second half of the video was a little bit easier (?) to Xiaomeng. She was wearing a Japanese one-piece school swimsuit and a breathplay hood with a breathing hole. She was very careful so I think there was little water going directly inside the hood through the hole, but on the other hand the air in the bathroom was already quite humid and the oxygen level is low, which made her breath not efficient. It is a big challenge to stay under the breathplay hood for 12 minutes in such a humid room without a break, and no need to say that there was quite some disturbance to her respiratory rhythm: water, tickle, blocking the breathing hole, vibrator, and an extremely strong orgasm. She was completely exhausted when she was finally released.