An avid romance fantasy fan falls victim to a demon's schemes after her death; and instead of being reborn as a wealthy heroine, she awakens as a small, sickly child. Abandoned by her father, Duke Phaeraton, the little girl is doomed to scrub floors and suffer abuse at the hands of her egomaniacal relatives until the day the duke returns from the war to collect her.

When the fateful day finally arrives, the girl is certain her misfortunes will continue as she leaves with the cold-hearted duke. Even though she now has a luxurious home and an expressionless father who still wants her to live like a noble, there are rumors that claim she is not truly the duke's daughter. Moreover, a mysterious status window appears before her, allowing her to borrow powers from her favorite romance fantasy heroines and earn cash to survive—unless her cuteness wins her father over first.

Lord Baby Runs a Romance Fantasy With Cash has been published digitally in English by Tapas Media since December 26, 2023.