From the creator of Kizuna comes a story of Yamato and his three misfit teammates. They are all part of a detective agency, and they are willing to go to extreme measures to get the job done.

The target for Yamato and the guys is the truly evil Zama, a sleazy drug dealer who forces runaways and kids under his control to push for him. But Zama’s also the man who left a teen-aged Tamaki deeply scarred. Though he knows all too well how demented Zama can be, Tamaki insists he can stop the monster dead in his tracks! Will the team race to his aid when he needs them most?

Sweet (and sugar-addicted) programmer Kippei is an invaluable part of his team! But when a client's case regarding a long-lost heir suddenly brings the bright young boy into the spotlight, everyone is forced to look back on Kippei's shadowy former life in order to uncover the darkest of secrets. Will the squad stand strong...or will they lose Kippei forever? Border breaks down the barrier between work and play with a team of brilliant guys who think nothing of fighting crime and roughhousing after hours! Though they come from totally different backgrounds, these men share a bond that runs much deeper than blood. But will they be ready to let go in the toughest of circumstances?

Sohgo und Yamato sind schon lange Freunde - verdammt lange! Als ein gemeinsamer Schulkamerad ihre Hilfe benötigt, müssen sie sich mit ihrer Vergangenheit auseinandersetzen und alte Wunden brechen auf...

Sogo is best friends as well as the right hand of Yamato, the leader of a group of professional punishers called The Team J.A.T. They've known each other since their high school days. Sogo catches Yamato having sex with Hyoudou, the Karate's team captain and the two's relationship soon becomes estranged as Yamato thinks Sogo suddenly dislikes him. Even so, they eventually work it out and Yamato decides to tell Sogo everything. An everlasting bond develops between them as they share their past and secrets. But an unexpected call could change everything... Sogo's story which started in Border Volume 4 finally completes!