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!
