Kon'yaku Haki-go no Akuyaku Reijou: Shokku de Zense no Kioku o Omoidashita node Happy End Mezashimasu!

Amaryllis Christo, the eldest daughter of a duke, is told that her engagement is broken off by the third prince, whom she loves with all her heart. At that moment, in shock, she remembers her memories of her previous life and realizes that this world is the world of an Otome game that she had played in her previous life. Is there no way for the villainess "Amaryllis" to be saved? She tries to find a way to a happy ending by relying on her memories of her previous life, but... as the scenario progresses, it is revealed that Amaryllis has a magical trait called "black possession," a persecution target that "I" had no knowledge of. Will Amaryllis be able to get a happy ending?

https://www.cmoa.jp/title/268781/