Kim Dong Bin was a Korean pop trainee for seven months under Kiwi Media Group prior to his appearance on Produce 101 Season 2. He was eliminated in episode 8 and ranked 58th. At the start of the competition, he was expecting to get an A rank, but during the evaluation, the performance was stopped midway because of a misunderstanding.

After the show, on 6th August 2017, he was diagnosed with traumatic depression and working to treat it. During this time, he left Kiwi Media Group and joined MLD Entertainment. He was selected as a collection model of NINETEEN EIGHTY by Moon Jung Wook's designer brand in 2018 S/S Hera Seoul Fashion Week. He was walking down the runway on October 19, 2017.

After training for one year and nine months under MLD Entertainment, he made his appearance as a contestant on Produce X 101.