Sophia, the Marquis's daughter, is a villainess who, during her time at the academy, corrupted the Crown Prince (despite his engagement) and his retainers, leading them astray.

Having lived as she pleased, she was denounced for her actions by her half-sister and married off to an eccentric man living in the remote territories."

Away from the Royal Capital, where such rumors circulated, Sophia secluded herself in the library at the mansion of a man commonly known as "Lord Heart, the Number Obsessed."

Her true identity was merely that of a history geek, skilled only at feigning smiles and uttering insincere words.

And Lord Heart, who had accepted her, was an eccentric recluse, living up to his nickname.

Lord Heart's demand was to bear an heir. Told to do as she pleased otherwise, Sophia spent her days unreservedly immersed in books. However, a certain incident leads her to attend a dance party with Lord Heart.

Sophia supported and encouraged the reluctant Lord, gradually deepening their relationship.

(The main story has been completed, so it will conclude relatively quickly. The main story consists of six chapters.)