Jishou Akuyaku Reijou na Konyakusha no Kansatsu Kiroku.

A woman named Bertia is reborn into the world of her favorite otome game, but not as the main character. Instead, she becomes the villainess betrothed to the ideal Crown Prince Cecil. Knowing her in-game role is to hinder his future love interest, she aims to fulfill her villainous fate. However, her attempts at mischief only seem to make her more likable.