"Will this relationship change if we kiss?" Lee Seung-jo, the eldest son of the Jaekyung group, which is said to be the cornerstone of the royal family, and Chu Yi-yeon, who worked as Seungjo's secretary while hiding her unrequited love for him. And during the same time, Lee Moon-jo, the illegitimate child of the Jaekyung group, always wanted her to win her man. At a certain moment, Lee Yeon's troubles begin between Seungjo, who keeps approaching Lee Yeon, and Munjo, who wants Lee Yeon as usual... ! A breathtaking romance between the perfect but salty reincarnation master Seungjo and the openly wretched illegitimate illegitimate son Munjo, and secretary Lee Yeon who is dangerously entangled with the two.