殺されたくなくて悪役な婚約者を愛でていたら、なぜか溺愛されました

As a young girl, the protagonist realized she had been reincarnated as Diana, the villainess of an Otome game. At this rate, she'll be killed by her fiancé, Sadias, exactly as the game's scenario dictates! To prevent that, she must adore and cherish Lord Sadias, and raise him to be a good boy who won't kill her! However, by the time Diana regained her memories of her past life, her relationship with Sadias was already at its worst. Even when she's kind, he's suspicious, and it seems difficult to wipe away his distrust. But if she can't win over her fiancé... she'll be killed. What will become of Diana's fate!?