The one story that came to mind straight away but I couldn't remember its title until I looked it up is: For You Who Grieves
ML doesn't take too long to warm up to MC and if I remember correctly, he didn't have a relationship at all with the guy whose body MC possessed...don't expect ML to immediatelty recognize MC in new body, though
https://www.mangago.me/read-manga/i_was_possessed_in_an_extremely_private_area/ you could try reading this.. also don't judge the name and make the same mistake I did lol
again is a good one! mc goes back in time https://www.mangago.me/read-manga/again_1/
I think the end of the road is also this kind of trope, and I really loved this story
https://www.mangago.me/read-manga/geu_kkeute_issneun_geos/

Listen, I'm a sucker for this trope. It does not matter if I've read it a billion times before. Give me a story where MC either goes back in time or possesses someone else and meets ML whom he knew before who also loved MC before the transmigration and I will eat it up EVERY.SINGLE.TIME!
I also like the hate to love trope (when ML misunderstood MC previously or hated the original body owner before the transmigration) but by far I prefer the "love to love" over "hate to love"