Living in an area known for its juvenile crime, 21-year-old Makoto has become a member of a youth gang called the G-Boys. Known for his cool head and ability to get things done, Makoto becomes a key troubleshooter 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.

The story revolves around 20-year-old Makoto, who frequently gets involved in highly dangerous situations, usually against his own judgment. Along for the ride are his best buddies Shun, Masa, and Takashi, the enigmatic leader of a local gang in Ikebukuro.