Kim Na-Yool is an overworked designer working at Ethical Communications, a famous advertising company. Night after night, she remains in the office to labor away a job that never seems to end.

But one day, after a long journey of misfortunes including the loss of all her precious work due to her computer overloading, Na-Yool loses it. That’s it! No more sacrificing her life for the sake of a company who does not deserve her!

In a sudden burst of courage, she barges into the President office to rebel. There, she witnesses her handsome boss, Kwon Si-Jin, secretly enjoying jerking off…

The weird office romance of a pervy CEO and his hardworking underling! What exciting events await Na-Yool’s long sleepless nights?