This drama took me by surprise. I really thought the whole premise with dissociative identity disorder would be way to gimmicky for a drama in 2015, but Ji Sung does an amazing job with all the different roles and personalities he played. His acting in this drama really illustrates an amazing range. It's incredible how the viewer can fall in love with all of the protagonists personalities even ones that make limited appearances throughout the drama. Additionally, I loved the relationship between Oh Siblings, Oh Ri Jin and Oh Ri On. Their friendship is infectious and side split-tingly funny. Kill Me, Heal Me has a perfect balance between laugh out loud funny and uncontrollable tears. This story's pacing is FIRE!! If you like dramas that keep you clinging to your seat, you should definitely give this drama a try.