In the initial plan, the taxi driver victim was the second, not the first, because Jo Kyu-Hwan's first crime was originally scheduled to be directed to randomly beat and kill a young man in the bathroom at the concert hall. However, the order changed as this scene fell out of the crank-in stage.
'Woo-Suk Kang' (0437652) and 'Kyung-gu Sol' (0812555)'s first collaboration.