Kabaneri of the Iron Fortress (Original Japanese Version) (English Subtitled)

The immortal monsters known as Kabane have attacked Aragane Station. Ikoma, a boy who lives in Aragane Station, ran against the waves of terrified civilians to fight against Kabane using a weapon he has been secretly developing - the Piercing gun.

Ikoma somehow survives and heads toward the last Hayajiro left in Kenkin Station, the Kotetsujyo. Meanwhile, Ayame and her people were left behind to fend off the Kabane when a young girl named Mumei appears before them.

Having escaped Kenkin Station, the Kotetsujyo heads for Kongokaku, the Shogunate's fortress. However, the people on the Kotetsujyo quickly turn against Ikoma and Mumei and attempt to drive them off the train.

The other people lock Ikoma and Mumei into the rear car, despite them being two of the best fighters. Just then, the Kabane attack! And among them is a Wazatori, a Kabane that has the ability to learn and become stronger with each battle

The Kotetsujyo picks up survivors from Yatsushiro Station which has been destroyed by the Kabane. Among the survivors is Enoku, an old friend of Mumei's. He points out to Mumei how weak she's become as she's grown closer to the people of the Kotetsujyo.

The Kotetsujyo is standing before a giant cluster of Kabane, the Black Smoke, and all seems hopeless. Meanwhile, Ikoma and Mumei find themselves at the bottom of an abandoned station.

The Kotetsujyo arrives at Shitori Station, the first populated station it's encountered since leaving Kenkin Station. Ikoma and the others go shopping for supplies, and experience their first moment of peace in ages.

The older brother Mumei serves is Biba Tenshin, leader of the Hunters - a special division dedicated to hunting Kabane. However, while the people praise Biba as a hero, Ikoma does not trust him.

The Shogunate closes off the path to Kongokaku because they are wary of Biba and the support he's managed to garner. Biba seeks an audience with the Lord of Iwado Station, though with less than pure intentions.

The Kotetsujyo had been linked to the Kokujyo, and Takumi and the others were under the rule of the Hunters who demanded their blood be collected. While others fall into despair, Ikoma refuses to give up hope as he devises a counteroffensive.

Biba reunites with his father Shogun Koukyo after 10 years, as Mumei's Nue stands ready. Meanwhile, Ikoma has lost his confidence and willpower. He is now a mere shell of his former self and can only cower at the sight of the Kabane.

Biba's plan, Mumei's Nue transformation, and the influx of Kabane were all too much for Kongokaku to withstand. Ikoma arrives, having modified his body once again, and enters Kongokaku in order to rescue Mumei.