As the illegitimate child of a third-generation chaebol, Yeonseo can only choose to wander around in her pajamas, longing for someone. In front of her appears an actor named Chae Joo-an. Once a top star, Joo-an lost his popularity due to frequent scandals, and meeting him makes Yeonseo feel empathy for someone other than herself for the first time. Fate mischievously brings the two together in love. A story that is infidelity for some and first love for others.