Ouji-sama nado Irimasen! Wakiyaku no Kanemochi Akujo ni Tensei Shiteita node, Konse de wa Zeitaku Zanmai ni Sugoshimasu

The self-centered marchioness, Rosa Kreutzers, is injured after being kicked by a horse on the way home from the theater with Prince Alex. But in that moment, Rosa realizes something significant: "This is the world from the manga I read in my past life! And I'm a minor villainous character destined to be poisoned!" In her previous life, she was an overworked corporate slave who died from exhaustion. In this life, she's a villainess slated for poisoning. There's no way she's letting that happen—not when she's been reborn into unimaginable wealth! She'll spend freely and live a long and luxurious life! This is Rosa's struggle to avoid her predetermined fate and enjoy a life of extravagant luxury.