Rent Peacemaker: Vol.6 (2004)

Spurred on by an acute desire for justice, the Shinsengumi prepare to smoke out their enemies. But playing with fire can get out of hand, and pyromania sets in on both sides. The conflict reaches a fever pitch as hands all-too-eager for battle stoke the flames of war. But not everyone is prepared to fight. Deeds from the past paralyse Yamanami, and lingering memories send Tetsu into a catatonic fit. The question must be answered now: will he become a demon and run with the wolves? Or will he choose a path of peace? Contains Episodes 19-21.