Akuyaku Reijou wa Ringoku no Outaishi ni Dekiai sareru

From Bookwalker: Tiara Rose, the fiancee of her kingdom’s crown prince, suddenly realizes that the world she’s living in is actually the setting of her favorite otome game from her previous life. But she’s not the heroine, she’s the villainess? By the time she remembers, it’s already the day before the graduation party where she’s destined to face “annulment of engagement” and “banishment from the kingdom”, just like in the game’s scenario. Everything seems to be following the original plot until the handsome crown prince of a neighboring kingdom suddenly proposes to her. A love story where the supposed villainess is adored by an ultra-perfect foreign prince.