Kang Taehyun is the CEO of KTH Corp., which is one of the biggest marketing companies in all of South Korea. A cold-hearted and arrogant billionaire that he is, all his employees are terrified of him because he would fire them in a matter of seconds, even if they made the slightest of mistakes.

One thing that no one knows about Taehyun is that he has a weak spot for his personal assistant, who has been working for him for a few years, but doesn't want to admit it.