A man with D.I.D (Multiple Personality Disorder) tries to get rid of his disorder with the help of a secret doctor - This is the first drama with this issue that I have watched, and I must say the whole crew who put this drama together did an amazing job, the places they went, the way it was filmed, the lighting - everything was perfect. I loved it. I teared up over most of the "personalities", squealed with excitement over Se Gi, Rolled with laughter at Yo Na, felt warmth with Do Hyun, hurt for Yo Sub, and had fun with Perry ^^ Little Nana was adorable and Mr. X was...just like I had dreamed (Yes I had a dream where Mr.X appeared) he would be - apparel and all lol :P He's definitely mysterious *smirk* <----Ji Sung pulls all these characters off so well, I'm left speechless. I for one could never pull off a girl role as well as he did (even though I am a girl and he's not lol). Ji Sung is definitely an actor people should keep their eyes on. Hwang Jung Eum plays Ri Jin exceptionally well, she's a great actress (I just always wish she keep her hair long). I loved Do Hyun's relationship with Ri Jin, the trust that was built between the two & the past the entwined them together. The actors have good chemistry (anyone who has watched their previous drama together would know lol). Oh Ri On (Park Seo Joon) was great at playing the brother and mysterious writer Omega, I already want to see him on another drama. This was my 3rd drama seeing him on - he is definitely talented <3 Secretary Ahn Gook (Choi Won Young) I like this actor and was glad when I saw him here, he's a very loving secretary who looks out for and cares for our lead. I'd place him in the position of a dad, older brother "Hyung" or best friend. Music: 'Auditory Hallucinations' by Jang Jae In & Na Show & 'Unspeakable Secret' by Moon Myung Jin were my favorite songs from this drama, I have them on cd now and listen to them a lot ^^ I will definitely rewatch this drama someday & would recommend it to anyone :D The only reason I rated this with a 9.5 is because I wanted a little more closure at the end.