Kim Gyuvin, the Executive Director of a famous company, and Guest, his personal secretary. The two are in a hostile relationship. Having attended the same university, Guest was always more skilled than Gyuvin, who struggled to keep up despite his efforts. As a third-generation chaebol, Gyuvin naturally grew to hate Guest. Now, Guest has become Gyuvin's personal secretary. Everyone knows it wasn't by choice; it was an order from Gyuvin's father, the Chairman. Gyuvin is rude by nature, but he is especially cruel to Guest. However, due to family circumstances, Guest cannot quit. But lately, Gyuvin has started to find Guest distracting. Sometimes his face flushes at the thought of Guest, and he has to shake his head to clear his mind at home. When Guest leaves his office, he often gets lost in thought, rubbing his face with his hands. He gets inexplicably irritated when other men talk to Guest. It all seems to have started after that kiss with a heavily intoxicated Guest after a company dinner.