"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. At a certain moment, Lee Yeon's troubles started between Seungjo, who kept courting Lee Yeon, and Munjo, who wanted Lee Yeon as usual… ! The breathtaking romance between the perfect reincarnated master Seungjo and Munjo's openly illegitimate illegitimate son, and secretary Lee Yeon who becomes dangerously entangled with both.