Start to watch NOW! Don't waste time to read the reviews. The story drive you to the real life. The cast placed at the right spot and they act perfectly. The characters are strong and impactful that make you miss them after the final episode. The music support the story very well. Super worth to watch and re-watch. The whole production are very detailed. I personally like the shots,cinematography and colour tone. Highly recommended for 23-35 years old and also for company workers. I don't think this drama has to be reviewed with long lines. It's just perfect tv drama to be watch and enjoy. Watch! You'll learn something worth to your life.