I've tried looking through multiple tags and no luck, so I've decided to turn to the forums! I'll try to describe the plot to the best of my ability.
The main character, let's call her A, goes to some bdsm/sex place (???) at night and there she meets B, who is a employee there. At this place, the workers are not allowed to reveal their true identity under any circumstances, so they all wear masks, and so do the customers if I remember correctly. I don't remember if A was a regular of B's or not, but A desperately wants to see B's face because she loves her, but obviously, she can't. Later on, B quits working at that place and continues to work at her day job as a doctor. Soon, A shows up at B's work place and joins as a nurse, and B recognizes A almost immediately. B has feelings for A and she can't reveal that she was once a worker there, but she still tries to pursue her romantically/sexually.
Aaaannnd that's all I can remember. I don't really remember what the characters look like, but I wanna say A has light hair and B has dark hair.
It should be a one shot, and if I remember correctly, it's an original work as well. I don't remember when it was published, but I believe I read it about 2 or 3 years ago.
Any help would be appreciated! Thank you for reading!