This drama is really different from what I'm used to watch regarding Kdrama. There is something extremely thrilling about the way you discover things about the characters with the flashbacks. Every moments are mixed up with others from different periods of the past but surprisingly you are not lost and you enjoy every scenes! Personnaly, I'm in love with Seo In Guk, he is charming and realistic. The story is really rooted in reality but also super fun. A must watch for its originality!