Help finding manhwa

It’s was a popular one about a girl who got betrayed after doing everything to get the man she loved crowned as king. The guy has red hair. She has black hair with green eyes. The guy got with her sister who was known to be beautiful (brown hair and I think purple eyes?). Our female lead wakes a few years before she was betrayed and decided to help the crown prince become king since his brother (red haired guy) hated him. Does that ring any bells?