When asked about an older brother in real life, D.O. said,"He is three years older than me. Memories of playing with him and fighting with him helped me in this movie." The interviewer then asked,"How was working with Jo Jung Suk? People say you guys look alike."D.O. replied,"I am just thankful. I was his fan, so I've watched all of his previous works. I always wanted to work with him, but I didn't know I would meet him so soon. I liked that he was like an older brother, and I am thankful that he led me while filming."