Asian masturbate hidden in public stairwell

I don't have an actual video or Pic to provide but I saw someone post a Pic a video link a while back on this site. It was about a asian chick who was doing a standing mast with a mask on. She was what looked to be in a stairwell in public as she kept checking if people were coming. She was wearing a coat over a school uniform and a mask like for surgery they wear when sick. It was an amateur cam video and she was all by herself. Looked like she set her cam or phone up before recording. She starts touching herself for about 10 min and cums while standing then stops. I found a post here some time ago with the link so hoping someone can help as I have had no luck searching. Picture is unrelated