Orient 18 (manga)

Musashi has been captured by the Obsidian Eight, and Shishikado is grievously wounded after being cut down by Kazumasa. Hakujishi Castle appears on the verge of disaster when Kojiro steps forward, bearing his newly forged black blade. Yet, surely even that won’t be enough against both Mikito and Kazumasa...unless Kojiro has one final trick up his sleeve.