I forgot the nameeee

There’s this one story historical reincarnation or something like that I don’t really remember if she’s someone else reincarnated or herself reincarnated but like on the first episode we learn that she slept with the ml and after that he literally becomes in love and somewhat obsessed with her (like not in a bad way), and she decides to keep dating him until the ogfl shows up in the story but when the ogfl does, the ml and the ogfl don’t fall in love and if I remember correctly, both the ogfl and the ml like the fl (one romantically while the other as a close friend) and I’m pretty sure her name starts with a y (I could be mixing it up with something else) and she has brown hair and the bump has black hair. (The story is also already completed I just can’t remember the name and I looked through my lists and it’s not there even tho I remember putting it there) if someone knows pls tell me the name TT