I Was Reincarnated as the Villainess in an Otome Game But the Boys Love Me Anyway!, Volume 1, 1

Fated to die as the villainess of an otome game, Mystia sets out to change her own unhappy ending! Mystia Aren is the daughter of a noble family, and she just started high school. She's surrounded by a group of adoring classmates and her charming fiancé. Everything seems perfect. Except that this world is actually a dating sim called Kyun-Love, and Mystia knows she's been reincarnated into the role of the main character's evil rival! Mystia is determined to do everything she can to avoid her fate, but it's not as easy as it sounds. Especially when all the boys keep falling in love with her!