If you expect a somewhat happy ending then pls don't finish this. I just read the raws and (spoiler alert)
She fcking gets crazier. I didn't rlly understand anything but there was another girl which I guess is dating the ml. Towards the end , the fl stabs her neck in front of the ml to get his attention. Fortunately, she survived, but she still had issues and didn't change in the slightest. On the last chapter, the ml returns from abroad, (kind of) left the other girl, and walked with the fl which was on a wheelchair, while the fl is crazily laughing. And the end!
It's a pretty decent ending but I didn't even see Soojin towards the ending. And I thought she would change, but she was still crazy for ml's attention. It just hurts seeing someone like that > ~ < (even though it's fiction but stilll!!)
I read and liked a lot of "i became a villainess in a game/another world" mangas, and reading this now makes me cringe by how predictable the heroine is. Looking at her defending the child and the ml being surprised just made me cringe...