Akuyaku Wa Kois Shicha Dame Desu Ka? summary:

She wasn't reincarnated as the heroine of the dating simulation game, but the villain...! Due to her selfish, domineering personality, Mylene's fiance, prince Rendall, doesn't like her in the slightest. However, she becomes disorientated by the return of the memories of her past life, and he finds out that she's actually an innocent crybaby! Convinced that she's scheming to dump him for someone else, he gets jealous and warns her to stay away from other guys. With other key characters getting involved in the fray, what will become of Mylene's love!?