Kill Me, Heal Me
킬미, 힐미 (original)
Cha Do Hyun is a rich heir to a family company with one major problem. Due to suppressed childhood trauma, he suffers from dissociative identity disorder manifested in 7 unique personalities who are out of his control. In order to overcome this disorder in secret, he hires a first year medical resident to help him heal by killing off each personality one by one.
Starring Ji Sung, Hwang Jung-eum, Park Seo-jun, Kim Yoo-ri, Ahn Nae-sang, Choi Won-young, Myung Se-bin, Oh Min-seok, Kim Ye-joon
Watch "Kill Me, Heal Me" on Rakuten Viki released in 2015. It's a drama and comedy show, and has a rating of 8.3 out of 10 from Imdb which is very high for this kind of show, and is currently available to watch for free.