It showed the webtoon of a story of a black/brown haired girl hit by a truck and she was transported/reincarnated in a castle. She now had a long red hair, were she is in a room with a blonde guy with 2 girls sitting in bed. And she found out he was his fiance and she slaps him and broke off her engagement and she leaves the room and encounters the black haired dude outside.
I feel a like the MC shouldn't jump to another relationship with anyone related to the ML and stay/go at a place where he could have a lot of chances of meeting him. Since he could start anew and easily forget the ML, if he stayed as far away as possible.