"Will this relationship change if we kiss?" Lee Seung-jo, the eldest son of the Jaekyung group, who is said to be the cornerstone of the royal family, and Cho Yi-yeon, who works as Seungjo's secretary while hiding his unrequited love for her. And at the same time, Lee Moon-jo, the illegitimate son of Jaekyung's group, always wants him to win everything.