One of the best dramas, I've seen this year. Last year, there were some dramas that started out promising but then fell flat towards the end. This one though, I love the pacing, there was no unnecessary scenes, in my opinion. I know some people think the end was lacking but I thought it was great, Here's a breakdown of my review. THE STORY - a story about a guy who has D.I.D. (Dissociative Identity Disorder) also known as a multiple personality disorder, meets a psychiatric resident. Together they help each other put the separate identities back together. This is one of those dramas where I was really happy with the writers. The plot was well thought out, and like I said above, there weren't really any unnecessary scenes. This drama made me laugh, cry, scream. For me, any drama that can put me in an emotional rollercoaster and give me all the feels is an A+. THE ACTING/CAST - I've watched Ji Sung in Protect the Boss & My P.S. Partner. I enjoyed his acting then, and I still enjoy his acting in this one. The way he portrayed each of his split personalities was awesome. Hwang Jung Eum, I haven't really watched her in anything. Well, it said on her profile, that she was in Potato Star, but it was such a minor role, I can't even remember her there. She was pretty cool in this drama. My other favorite actor in this drama was Park Seo Joon. I've never seen him in anything other than Bang Yong Gook's MV, "I Remember". But I love him in this drama. I didn't really have second lead syndrome in this one. THE MUSIC - All the songs in the OST are awesome. They captured the right emotion for each scene. And "Auditory Hallucination" by Jang Jae In feat. Na Show has a special place in my heart. REWATCH VALUE - Yes! Heck yes! I will re-watch this drama again. It was just one of those dramas that didn't really let me down. OVERALL - 10 out of 10. Like I said one of the best dramas for 2015. This drama gets two thumbs up. :D