
Love triangle with 1 top and 2 bottoms?

I haven’t read Yours to Claim so I dont know exactly what you’re talking about tbh but it’s a bit of both? Kinda poly in the beginning (especially physically) but it’s a love triangle with two people liking one person emotionally and later on focus on main couple. I’m very sure that the love triangle involves 2 bottoms and 1 top tho.

Any bls where the main couple is like a good couple, but somewhere like in the middle of the story, one of them cheats. Basically a story where a top or bottom isn’t introduced as a cheater, but is exposed as a cheater later in the story

It's not technically cheating, since they're not exactly exclusive, but the vibe is similar https://www.mangago.zone/read-manga/hina_wa_mitsuiro_no_koi_ni_torawareru/
It was a bl manga, I kinda forgot how it went, it was short (I think only 6 chapters, black and white) and at the end when they were about to have sex, one of them asked “so who’s taking it” and then they both say “ain’t it you?” And then they get into a little argument and then the top basically says like “I was really looking forward to fucking you” or something like that, so then the bottom lets him do it
Bokura no Tsuzuki