The TT-026 film yellowvac mentioned is actually part of a series so you can check all those out
https://missav.ws/en/series/変態公衆便所タンツボ肉便器女?page=1
Another movie in a similar vein that I loved was REAL-452 starring Miki Sunohara. All the scenes are elite but my favorite is the one where she’s getting dominated in a public bathroom.
At 1:08:15 she starts licking cum off the floor. It’s a dirty ass floor too.
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She doesn’t go into it all weak and shit, either, like just poking at it with her tongue or some bullshit like that. She presses the whole flat of her tongue onto that nasty floor and laps it all up like a dog. That’s a generational talent at work right there.
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You could also use tags like BDSM, M-jo, Humiliation, Submission, etc to find this kind of thing. I find it tends to pop up in those kinds of productions.