There is no doubt that there's a bromance between Lee Sung Min and Lim Shi Wan in the center of "Incomplete Life." The relationship between this superior and subordinate employee in the Sales 3 Team provided a lot to see in this drama as it showed consideration and respect permeating generations.

Lee Sung Min said, "I started to read the original piece and it was no fun reading about the daily lives of ordinary people." With this, he recognized that he was mistaken and started to fully delve into the lives of the working person in our society.

According to director Kim Won Suk of "Incomplete Life" Lee Sung Min had the toughest time dancing in front of Jung Yi Kap (played by Moon Choong Ki) while he was treating him as a client. He then realized how hard it was for ordinary people to act when trying to contract a project and was able to fully delve into his emotions.

Lee Sung Min fully embraced the character of Oh Sang Shik and showed his warm intentions despite a cold exterior. He truly was a "Wannabe superior" as he was weak to the weak and strong against the strong. Lee Sung Min continued to communicate on the directing and acting with the staff as he was the spiritual leader for Lim Shi Wan, Byun Johan, and other actors, continuously asking for help and advice.