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I can't remember what the title is

I randomly thought of a part to one I read a few years ago and it's irritating me because I can't remember which one it is.

It's not the main couple but a side one. The two are not together during the part I'm remembering. I think this was some type of university story and if I remember correctly, the bottom likes the top of the main couple (I could be wrong) and has a lot of one night stands/FWB, the side couple have a one night stand (pretty sure) but they don't get together. The bottom is upset about something and asks a "friend" for some sex drugs, the "friend" tells him he should take more than he should and I believe has one of his friends go with him. The dude ends up putting a sounding ring in him (don't know if that's the actual term) and leaves him like that. The bottom can't get it out because it hurts (or because his hands were tied, cannot remember) Somehow the top finds out (the one he had a one night stand with) and goes to him, and ends up helping him get it out and finish.

I think it was non-colored and if it was I think the top had darker skin

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