During an interview with Ilgan Sports, he declared "On stage, she wore sunglasses and I didn't know she was really that cute since she was wearing them while performing. A while ago, I saw 4minute at Gimpo airport. I immediately went to them and asked them to take a picture together. However, their manager said I couldn't. If I had been a famous soccer player, it would have been possible. I will have to work harder."
When he was asked what his favorite song was, Kim Dongsub picked 4minute's I My Me Mine (Japanese ver.).
In addition, to the question "What would you do* if you were going to die tomorrow?", he answered "I would take a picture with 4minute. I really wanted to take one back then."
Kim Dongsub plays for the Gwangju FC in the K-League.