im trying to find this one manhwa

ok so there was this one chapter where the fl was with an art teacher who would be super famous in the future and there was also another girl who used to visit the teacher, and the girl was close with the crown prince, and the fl didn't want to have anything to do with the crown prince but she fainted in front of him. also she was in a disguise, she was disguised as a girl who was like really sick and never showed up to school for a whole semester. i'm really bad at explain but i hope someone can find it for me