Zense Furyou no Akuyaku Reijou nanoni, Yandere Ouji kara no Dekiai Route nante Kiitenai!

Kaori was the leader of a ladies' club. After being betrayed by her friends, she was reincarnated as Dahlia, the villainous young lady in her favorite otome game! In order to change Dahlia's sad fate, she uses her rebellious spirit and fighting prowess to stand up. However, for some reason, the first prince, Hedera, the cause of Dahlia's tragic love, becomes obsessed with her...!? (Source: Kadokawa, translated)