What happened to Secretary Kim? Volume 1

Lee Young-jun is handsome, intelligent, and arrogant. He is a wealthy heir to a family business and holds the position of president of a large company. Lee Young-jun is so self-absorbed and confident that he considers his opinion to be the only correct one.
For nine years, he has had the perfect secretary – the smart and beautiful Kim Mi-so. She impeccably fulfills her duties, and one can only envy her boundless patience. The girl anticipates all the thoughts and immediate desires of the president, and she fulfills any tasks at the first request.
But one day, Lee Young-jun's loyal assistant decides to resign… What happened to Secretary Kim? And why did she suddenly decide to leave her prestigious position?