Akuyaku Reijou desu ga Oshigoto ni Isogashii no de Dekiai wa Goenryokudasai! Oresama Ouji to Konyaku Haki Shitai Watashi no Funtouki

Our protagonist gets reincarnated as Amelia, the villainess from an otome game. If she follows her route, her engagement with the second prince, Elliot, will be broken off?! Just when Amelia was falling into despair, her bias appears in front of her! She decides to dedicate her life to her bias, using her engagement with Elliot as a tool in her plan. However, Elliot, who acted distant and disdainful towards Amelia in the game, is now concerned about her since she seems to be having fun while they are apart?! (Source: MangaPlaza)