Sauerkrautr

They aren't connected at all. The author just recycled the female lead's name in both stories which caused confusion with readers. The Serin in this story is an actress who has a thing for her boss. The Serin in the other story was a college student turned prostitute in some pointless revenge plot.

Thank you for replying!! I saw a few comments saying the lost is the sequel and after I read both I was confused af like how are those two connected lol

You're welcome and I felt the exact same. I would go as far to say the stories are staged in the same universe because in the the other story, Ser-In was actually her prostitute name. It wasn't her real name. The Ser-In here was innocent and somewhat naive. The other Ser-In was for the streets because she was actually cheating on the BF who unalived himself with her professor.