This Marriage Will Surely Succeed이 결혼은 반드시 성공합니다; I Gyeolhoneun Bandeusi Seonggonghamnida

Iona Modrov, known as the Emperors sword, hound, and secret lover, endures a harsh life as the illegitimate child of the Modrov family. Despite her sacrifices, she is forced into a political marriage and ultimately betrayed by the Emperor. On the brink of death, the only one who comes to save her is her unwanted husband, Duke Leroy Han. In her final moments, she asks for a last kiss before dyingonly to wake up in the past before everything went wrong. Determined to change her fate, she runs to Leroy and boldly proposes: Duke, marry me. This time, I will make you happy!