The Shinsengumi are already ghosts in history, this show knows that, and it uses Chizuru's presence among them to make you feel the weight of it. A girl searching for her father finds herself defending men who are fighting a war they've already lost, caught between human loyalty and the supernatural threat that binds them all. The OVA format means no filler, no bloat, just the sharp, quiet tragedy of soldiers moving through their final chapter while monsters close in from both sides.
Chizuru has spent months embedded with the Shinsengumi, the fearsome samurai militia protecting Kyoto during a turbulent period of Japanese history. Her search for her missing father led her into their ranks after they rescued her from a supernatural creature, and now she's become an integral part of their operations. When imposters begin committing crimes under the Shinsengumi name, suspicion falls everywhere at once. The organization scrambles to maintain order while simultaneously guarding a visiting shogun, their reputation hanging by a thread. The situation spirals when mysterious supernatural beings called rasetsu break free from confinement, and Chizuru vanishes during a routine patrol through the city. As her allies race to find her, darker secrets about her own nature and connection to these creatures begin surfacing. The line between ally and enemy blurs as the Shinsengumi confront enemies both human and otherworldly, questioning whether they can trust anyone, including themselves.