Makoto who lives in Ikebukuro West Gate Park, an area known for juvenile delinquency and gangs, tries to solve the mystery of the death of a friend, he finds himself very indisposed in many mysteries and problems.

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."

Living in an area known for its juvenile crime, 21-year-old Makoto is a friend of King, the leader of a youth gang called the G-Boys, though he himself does not want to join as a member. Known for his cool head and ability to get things done, Makoto becomes an key trouble-shooter for the gang by diffusing tense situations and keeping his friends out of harm's way. However, the death of his girlfriend and an escalating turf war with a rival gang threaten to be more than Makoto can handle.—AsianWiki