Serena works as a seamstress at the royal castle, hoping to help with her family's living expenses after their business failed.

During her lunch break, while resting in a secluded spot where no one usually comes, she stumbles upon an intense confession scene.

"I'm sick of it already," "Besides my looks, status, or family, what part of me do you admire?" and "Don't make me laugh," she hears.

She hears a man's voice brutally rejecting the confession with overly harsh words, despite it likely being the young lady's heartfelt declaration.

Curiously, when she peeks at the man's face, it turns out to be Lord Felix, rumored to be the most sought-after bachelor among noble ladies.

Her colleague Pamela also admires Felix, but Serena, from an impoverished viscount family, recognizes that he, a high-ranking noble with status, lives in a completely different world, and thus has little interest.

A little while after witnessing the intense confession, when she returns home, a luxurious carriage is leaving from the gate.

Her father calls her to his study, telling her, "A marriage proposal has arrived."

It was an offer to welcome Serena as the Marquis's second wife, in exchange for taking on their debt.

Thinking of her family and her older brother who will inherit the house, Serena decides to become the Marquis's second wife, despite him being 30 years her senior.

A week later, a carriage from the Marquis's family comes to pick her up, and the destination is a modest mansion, unlike what one would expect from a Marquis's residence.

What awaited Serena in the modest mansion was a devotion so overwhelming it left her bewildered...

The R15 rating is a precaution.

This is a story of doting love with a hint of yandere.

There are some differences from the e-book version.