any story where the two characters loved the same person but ended up together instead?

i wanna know too

https://www.mangago.me/read-manga/nande_koigataki_ga_ki_ni_nannen/

Inner Beauty, If You Hate Me So

this is a novel, I've been reading it and it's actually really good it's mpreg too(not omegaverse)
https://ckandawrites.online/dr-jiang-is-pregnant-with-his-nemesiss-child/