This Marriage Will Surely Succeed

Iona Modrov, referred to as the Emperor's sword, hound, and secret lover, faces a brutal existence as the illegitimate offspring of the Modrov family. In spite of her sacrifices, she finds herself compelled into a political marriage and ultimately betrayed by the Emperor.
On the edge of death, the only person who arrives to rescue her is her unwanted spouse, Duke Leroy Han. In her last moments, she requests a final kiss before her demise—only to awaken in the past, prior to everything going awry.
Resolute in altering her destiny, she rushes to Leroy and daringly proposes:
"Duke, marry me. This time, I will make you happy!"