Responses
This one maybe?
https://www.mangago.zone/read-manga/when_the_villainess_loves/
Yes! Thank you so much!
The FL is from another world that read a book about the isekai’d world. The MC has an incurable disease. She coughs blood when she dreams of the book MC memories. There’s 4 MLs. A knight, a magician, a guild master, and a hybrid. The MC actually had a twin but she passed so the remaining twin got her soul to a different dimension so she can live and got her back to their original world. Sorry the description is wack