Akuyaku Reijou wa Ouji no Honshou (Dekiai) wo Shiranai

Akuyaku Reijou wa Ouji no Honshou (Dekiai) wo Shiranai summary: During her blind date with Prince Dylan, Bertia suddenly remembered her past life and realized she had been reincarnated as the antagonist in an otome game. To avoid an unfavorable outcome, she tried to distance herself from the prince, but he surprised her by proposing. In order to protect the prince from disappointment, Bertia reluctantly agreed to a short engagement and to assist him until he met the game's true leading lady in five years. However, over time, their relationship grew stronger and Dylan's affection for her only grew. Bertia was confused by the prince's feelings for her, as she knew she was not the game's designated love interest for him.