Kim has branched out to act in TV dramas including Sunao ni Narenakute, Protect the Boss, Dr.
Jin, Triangle and most recently SPY and in films such as Heaven's Postman and Jackal is Coming.
Recently over 160,000 and 40,000 copies were sold in South Korea and Japan respectively.
The album ranked first and second in Gaon and Oricon charts.
The song was also on their fourth Japanese album The Secret Code, along with the songs "9095" and "9096" which were also composed by Kim.
The song, "忘れないで" was used in television advertisement for cosmetics in Japan.
He portrayed Jang Dong-chul / Heo Young-dal, the middle brother who grows up to become a lowlife gangster; his older brother Jang Dong-soo (Lee Beom-soo) becomes a detective, while little brother Jang Dong-woo (Yim Si-wan) is adopted into a chaebol family.He played the role of seemingly perfect Director Cha Mu-won, nicknamed "Prince of the Financial World" for his business acumen, who becomes frustrated and fight against the constraints in his life.He was also in Ayumi Hamasaki's music video for her 2010 song "Blossom".At a young age, he was given up for adoption by his biological mother to the Kim family, and his name was changed to Kim Jae-joong.When Kim was fifteen, he moved to Seoul by himself in order to take part in the auditions held by SM Entertainment.