
Na Ah-Jung, a struggling actress, agrees to a fake marriage with a wealthy chaebol heir to secure her future. However, her plans are thrown into chaos when her future brother-in-law, Lee Ji-Han, discovers the ruse and becomes fiercely determined to stop the union.
Determined to protect his brother and preserve the family's image, Ji-Han insists on living with Ah-Jung for two months to conduct a 'beta test' of her suitability as a bride. As they clash over domestic details, etiquette, and their conflicting agendas, the lines between their adversarial roles begin to blur, turning a simple scheme into an unpredictable test of patience and heart.