Got cheated on and meets a kindred spirit that hopefully heals their trauma together. Waiting for further revenge for the cheating girlfriend and bullies.
Mc was thought to be a child of affair bc her hair looked different and she was abandoned and treated harshly by her father and brothers. Later after getting kidnapped tortured and being rescued by someone else, she learned that her hair is magic and that her real hair color reflects his father's hair, she realize she was indeed his daughter and her mother didnt cheat. She grew up after many years and comes back for revenge against her kidnapper (hopefully against her family too).
Praying for bad luck for that prince
Jinsei Gyakuten ~Uwakisare, Enzai wo Kiserareta Orega, Gakuenichi no Bishoujo ni Natsukareru~