Rose Guns Days Sorrowful Cross Knife, Vol. 2 — Ryukishi07

Wanting to believe in the man he called his brother, Wayne finds him at the old hideout they once used as a safehouse years and years ago. Apparently, the feeling is not mutual -- Jack's first reaction to the sight of Wayne was to begin a deadly battle in the depths of the sewers. Driven into a corner by Jack's fierce attack, Wayne searches for the way to reach Jack's heart so he can finally learn the truth behind the murders...