I've always been a fan of older female/younger male kinda dramas. This drama especially made me fall in love with Ro Woon.
It might seem boring at the beginning with the whole work place stuff, and female lead was a bit slow to realize the fault in her relationship which was all a lie. Then came in Ro Woon, his boldness and expression got me through this whole drama, a man that knows what he wants and didn't give up till the end, even when female lead withdrew due to work situation. His feelings didn't waiver. The way he looks at her and wants to be around her really made me fall in love with the drama.
It's a perfect drama when looking for, workplace drama, slow but beautiful romance.