“Please marry me... just for one year! I’ll hand over Cassian to you myself, Your Highness.”

Lohiriel, who has lived for years branded as a villainess in her quest for revenge, is set on destroying Duke Cassian and his entire household—the ones responsible for her mother’s death. She’s even prepared for exile after her vengeance is complete.
But then she receives a terminal diagnosis.

There’s only one cure: a rare flower that grows in the Imperial Nation, which must be consumed in small doses every day.
With no time to waste, Lohiriel boldly proposes to Crown Prince Urlion and successfully enters into a one-year contract marriage.

As the new Crown Princess, Lohiriel uses her medical knowledge, passed down from her late mother, to treat the sick in the imperial palace—all while secretly preparing to carry out her revenge.
However, the days are relentless, and with no time to properly care for herself, Lohiriel eventually collapses...