Minatozaki Sana, A very bipolar boss. Her Mood Swings are just a crazy one. Even her two friends can't understand how her mood changes. Only her Secretary can last with her unexpected mood swing and bipolarity. Choi Yunseo, Half Korean and Half Japanese lady who's currently working for Sana in M. S. Company. Her father has a lot of debt that makes her work and study at the same time it's easy for her since her classes start every evening when she goes off to work. She's a family person and she always like to help them. She then decided to go for a job that will either make her life be hell or heaven. The moment she got her job and see her Boss. She just want to work all day long even though her Boss is a bipolar.