Akuyaku Reijou wa Ringoku no Outaishi ni Dekiai sareru

Right before running everything, Lady Tiararose realised that she was inside a game that she played in the past. In this game, she was reborn as the villainess fiancee of Prince Hartknights instead of the heroine. During their engagement, Hartknight accuses her of crimes and cancels their engagement, and chooses Akari as his heroine. Ignoring the truth, he decides to exile Tiararose.  A Prince from the neighboring kingdom, Aquasteed Marineforest, arrives and declares that he wants to marry her.