If you are looking at this as a genre guide, these stories usually follow a specific "recipe":

A legalistic agreement with strict rules (e.g., no falling in love, specific public appearances).

The original source material is a novel by Kim Ryeo-ryeong .

The story typically centers on a secret marriage service called . Unlike a traditional dating agency, NM provides clients with a "contract spouse" for a fixed period (often one year).

Usually, the male lead needs a wife to satisfy a family inheritance requirement or to ward off unwanted suitors, while the female lead needs money for a personal crisis.