SS501 5-year Flashback - Live Mix Special Stage - Kokoro

SS501 debuted in the Japanese market on August 1, 2007 with their first Japanese Single Kokoro. This single hit #5 on the Oricon chart, and move to #3 the next day. The five boys stayed in Japan for nearly 1 year and this year really made them grow up a lot and get even closer to each other.