It's Woo Seung Hyun's first day of internship. He met his superior Kim Jong Chan, who is handsome yet strict and scary. He also met Lee Kang Hae, a fellow intern who taught him on what he's supposed to do there.
Seung Hyun unexpectedly met Na Yoo Seong at the office, his crush in college, who's surprisingly friends with Kim Jong Chan. At work Seung Hyun impressed his boss with his idea for an ad, that he took Seung Hyun to a meeting.
Sparks fly between Seung Hyun and Jong Chan, but both are still unsure about office romance. When Seung Hyun got roped into an after hour party with the marketing team, Ji Yeon called Jong Chan to rescue him.
After their first kiss, Jong Chan and Seung Hyun decided to go on a date. But Seung Hyun is still hiding the fact that he's dating his boss from Kang Hae and Ji Yeon. As time goes by, Jong Chan and Seung Hyun's relationship got deeper.
After Seung Hyun and Jong Chan got through their first fight, their relationship blossomed even further. And finally Seung Hyun went to his first job interview at the company.
Seung Hyun didn't pass his job interview which came as a surprise to everyone. Jong Chan got furious as he found out about the conspiracy from the higher ups to purposefully failing Seung Hyun. He took drastic measures.
