Need help finding bl

Okay so I don’t remember much from this bl but ik it took place in “ancient” times in Korea (idk the proper timeline) and then as chapters went on it got more modern I believe there was a main couple the side couple as well not too sure tho. The story was kinda abt but reincarnation/soulmates so in every lifetime they found in each other kinda thing. I also think it has to do w some red kind of flowers at some point. Ik reincarnation was like a big plot of the story so there was some smut but not too much. I think ugh I rlly can’t remember too much but if u have any ideas pls help!