This was a really good story. Ji-Sung portrayed being 7 different people so well! I became a big fan of his because of this drama. I really believed Do-hyun had multi-personalities. This type of disorder is deeply psychological and hard to comprehend. The drama did a great job going through the trauma that caused all the personalities to come out and wrapped up how to heal Do-hyun at the end. Shin Se-gi was my favorite personality. He was straight forward and scary. He was also Do-hyun's first personality at a very young age. I felt for Do-hyun from the beginning not being in control and having to clean up after the actions of his personalities.
Oh Ri-jin was hard to watch. She was so annoying. Her and Ri-on have a really good sibling bonding relationship. Blood related or not, it felt weird to think there could be any romantic feelings.
The thing I did not like was all the replays and flashbacks in every episode. They replayed what happened after it just happened! Another frustrating part of the drama was no one would answer any questions! Do-hyun's mom and grandma would make him go talk with them, but when he asks questions about the past, they just turn him away. The build up of unanswered questions did pay off big at the end. I did enjoy the big reveals and shockers of their past.
I loved the OST Auditory Hallucination, the rap part was so depressingly good!