The selfish noble daughter, Rosa Croitzer, is kicked by a horse on her way back from a theater date with her first love, Prince Alex. Thanks to that, she ends up with a large scar on her forehead! However, what’s more significant is that she realizes, “This is the world of the manga I read in my previous life, and I am the villainous supporting character who gets poisoned and killed in the first chapter!” In her past life, she was a corporate s*ave who died from overwork. In her current life, she’s the heiress of a super-rich duke, with no plans of being poisoned. It’s no joke. She’ll spend recklessly and live a long life! This is the story of Rosa’s struggle. It’s a comedy with no tricks or setups.