Watashi wa Akuyaku Reijou Rashii no de, Last Boss wo Mederu Gakari ni Naru Koto ni Shimashita

Roxanne, the villainess. One day, she realizes she's living in a novel world where her ultimate favorite character exists. Broken engagement? Who cares! She'll do everything in her power to help her ultimate favorite, the ruthless and cold final boss, and make him happy! A full-throttle romantic comedy for her favorite character!