Second Life of a Trash Princess망나니의 누님이시다; Mangnaniui Nunimisida; Crowning a Spoiled Prince; A segunda vida da princesa lixo; เมื่อฉันเป็นพี่สาวของอันธพาล; 暴れん坊のお姉様; 混球的姐姐; Cuộc sống thứ hai của cô công chúa vô dụng; Em trai tôi là hoàng đế ngang ngược; Ella es la hermana de un rufián

Regina, whose father was the emperor that got assassinated, became the regent on behalf of her younger brother. While facing plenty of hardships, news about the depletion of national funds due to her maniac younger brother's behavior, as well as her fianc having an affair, begin to spread... In the end, she loses everything when her fianc commits treason. In her last moments, she turns back time using the relic of the first emperor. In order to stop the main culprit, Regina declares that instead of a maniac, her brother will become a love-crazy fool.