This story follows a young man named Makoto who lives in Ikebukuro West Gate Park, an area known for youth delinquency and gangs. In fact, one of Makoto's best friends from high school, Takeshi, is the "king" or leader, of one such gang, called the G-Boys. Makoto is known for being tough and smart, and while trying to solve the mystery of a friend's death, he finds himself a somewhat unwilling helper in many mysteries and problems of IWGP inhabitants. All the while, gang tension is mounting between his best friend's gang (which Makoto refuses to join) and a new gang, the "Black Angels."

Cast
* Nagase Tomoya as Makoto Majima
* Kato Ai as Hikaru
* Kubozuka Yosuke as Takashi (King of G-Boys)
* Morishita Aiko as Ritsuko Majima (Makoto's mother}
* Yamashita Tomohisa as Shun Mizuno
* Sakaguchi Kenji as Yamai (Doberman)
* Yazawa Shin as Chiaki
* Koyuki as Matsui Kana
* Kitaro as Yoshioka
* Watanabe Ken as Yokoyama
* Tsumabuki Satoshi as Saitou Fujio
* Sato Ryuta as Masa
* Sugita Kaoru
* Abe Sadao as Hamaguchi
* Watanabe Tetsu Tetsu (Takashi's father)
* Maehara Kazuki Sakurai (police officer)
* Waki Tomohiro (member of G-Boys)
* Nishijima Kazuhiro
* Takahashi Issei as Kazunori
* Yusef Lotfi as Ali