Acid Town manga volume 4 features story and art by Kyugo.

In a run-down city riddled with poverty and gangs, survival is a daily struggle. In a shocking revelation of the relationship between the scheming Reiji Nakamoto of the Snakes and Masatsugu, heir to the Seidoukai yakuza group, the threads between Yuki's painful past, Hyoudo's complicated loyalties, and the source behind the growing threat of gang warfare begin to be unraveled.

Reiji and his sister Hisako are the children of the Kawaguchi group's leader, sworn enemies of the Seidoukai. Orphaned by the conflict between groups tearing the city apart, they are taken in by none other than the head of the Seidoukai himself. But though their lives are comfortable and free of the threat of gang violence, Reiji can't help but feel that something is missing in his life, and there are answers to his past and present being kept from him. But the truth is a painful, bitter pill to swallow, and the revelations that follow will shape all of their lives to come…

Acid Town manga volume 5 features story and art by Kyugo.

In a run-down city riddled with poverty and gangs, survival is a daily struggle. In a shocking revelation of the relationship between the scheming Reiji Nakamoto of the Snakes and Masatsugu, heir to the Seidoukai yakuza group, the threads between Reiji's origins, Yuki's painful past, and Hyoudo's complicated loyalties begin to unravel, exposing the decade-old web of hatred, adoration, and hurt behind the violence tearing the city apart.

Reiji and his sister Hisako are the children of the Kawaguchi group's leader, sworn enemies of the Seidoukai. Orphaned by the conflict between groups tearing the city apart, they are taken in by none other than Domoto, the head of the Seidoukai himself. Masatsugu, young heir to the Seidoukai, is immediately besotted with the siblings, cherishing and looking after them in the hopes of one day seeing Reiji and Hisako achieve their own bright futures, free from the stain of the criminal underworld. But his father holds less than noble intentions toward the two — and there is no easy escape from the old hatreds and bad blood of the past.

Acid Town manga volume 6 features story and art by Kyugo.

In a city where lawlessness rules, every day is a struggle for Yuki and his best friend Tetsu. In a desperate attempt to pay for his brother's hospitalization, he was forced to strike a deal with the Seidoukai; however, Yuki's dark past has finally caught up to him, dragging him back down into a tangled web of extortion and underworld deals. Ordered by the leader of a rival organization to get close to Hyoudo for nefarious purposes, he feels that he's left with no choice but to return to old and painful methods of survival just to get by.

However, Hyoudo's connection to Yuki runs deeper than that chance meeting. For years, Hyoudo has been searching for him, hoping to keep a promise he once made to Ryuuji, Yuki's father. But those simpler days of brotherhood and camaraderie are long gone, and as Masatsugu and Reiji's schemes herald a coming storm of violence and bloodshed, can Hyoudo still fulfill that promise and protect those he holds dear?