OM Drama recs (out of curiosity) - no cheating

Okay, so this is more for curiosity's sake because I don't actually see this, while I see a lot of OW (other woman) drama. I don't mind OW as long as it's done well, but I was wondering what it would look like from the other perspective. Such as, the FMC has a male best friend and she has no idea he likes her, and it causes a lot of tension with the harem.

Honestly, as long as there is no cheating or the guy is used to make the MMCs purposely jealous (ive seen a fair bit of that trope) it can be anything - high triggers, fantasy, contemporary, OV, shifters, MC/gangs. Like if the OM tries to break them up (like the Burnt by Mae Pierce as an example, one of the MMCs close female friends likes him and tries to break them up) or even if he ends up a part of the harem later, doesn't matter to me, I'm just curious as to what that experience would be like since I've seen a lot of OW and no OM drama