It's about a high school girl who hated her life and so she wished that she could just be in i think her friend body or somebody else's life and then one day she woke up in someone else's body and she was so happy and everything was fine until she found out that the body she was in somebody is trying to kill her. I think it was a guy thats a friend of the person body she's in thats trying to kill her. So now she feels regretful and she has to go on a mission to try to figure out how to get her body back in time before she gets Killed and never existed.
The Reason Why Raeliana Ended up at the Duke’s Mansion It fits your summary really well. Tho you might’ve read the manhwa since only a few chapters have been translated from the novel.
Hey thanks for the recommendation but its a book like a paper back publish book. I think its an American or English book