The reconnaissance mission is a lie. Each captain reveals what he's willing to lose, and none of them choose the same answer. This OVA tears into the machinery of loyalty itself: what the Shinsengumi costs them individually, what Chizuru's presence costs them, what survival costs when you've already stopped being human. You get six episodes to watch these men fracture under pressure that has nothing to do with swords. By the end, you understand why they follow orders that destroy them.
Chizuru accepts an undercover assignment that sends her into Shimabara disguised as a geiko, working intelligence for the Shinsengumi while danger closes in from every direction. What begins as a straightforward reconnaissance mission unravels into something far more complicated as multiple factions converge on the same location, each pursuing their own agenda. The story peels back layers across six episodes, revealing how each captain plays a role in the operation and where the demons fit into the larger picture. Rather than following Chizuru's perspective alone, the narrative shifts between key players: Okita, Saito, Harada, Toudou, Hijikata, and Kazama. Each viewpoint adds new dimensions to what's really happening, turning individual moments into a complex web of loyalty, danger, and consequence. The tension builds deliberately. Days blur together as the mission progresses, and what seemed clear at the start becomes murkier. Relationships strain under pressure. Demons and humans clash. By the end, everything has shifted. This OVA deepens the world's mythology while showing how power, choice, and circumstance collide.