I Was the Perfect Lady, Now I’ll Be the Perfect ThreatNew淑女の鑑やめました。時を逆行した公爵令嬢は、わがままな妹に振り回されないよう性格悪く生き延びます！ ; Shukujo no Kagami Yamemashita. Toki wo Gyakkou shita Koushaku Reijou wa, Wagamama na Imouto ni Furimawasarenai you Seikaku Waruku Ikinobimasu! ; I Quit Being the Perfect Lady. The Duke’s Daughter Who Rewound Time Will Survive by Being Mean So Her Selfish Sister Doesn’t Use Her Again!