Education, familial love, and freedom were always reserved solely for Lariette Blanche's older brother, Ryan. In contrast, she is treated merely as a tool for her crumbling and desperate noble family to regain their riches. However, as Lariette obediently awaits her marriage to a wealthy old man, she receives the harshest of news: due to her overabundance of mana, she is terminally ill with only three months to live.

Lariette refuses to endure mistreatment any longer and creates a bucket list—including dating a handsome man! Coincidentally, Lariette encounters Duke Asrahan Kandel, the empire's fiercest knight, who suffers from a curse that makes his body reek of rotting flesh. As the only one with enough power to undo Asrahan's curse, Lariette requests that he date her for three months in exchange. Asrahan hardly considers himself worthy of love, but with her boldness and flirtatious advances, Lariette may just change his mind.