Semeagu Jakusha. Biba and his troops are now in control of the hayajiro and its passengers, using their blood to feed his Kabane. Biba offers a deal to Ayame that if she can open the gates to Kongokaku, and arrange a meeting with his father, he will guarantee the safety of her people. He tells her of the time when his father sent him with 400,000 troops to Kyushu to fight the Kabane, but when replacement supplies failed to arrive they were overrun and wiped out, for which he blames his father. Meanwhile Ikoma hatches a daring plan with some of the passengers to retake control of the hayajiro. Biba offers Mumei a chance to join his troops but she refuses and is forced to take captive vaccine and sedated. Ikoma's group starts their attack to take control of the Kōtetsujō, but Biba had anticipated a counter-attack and confronts Ikoma, killing Takumi who sacrifices himself to save Ikoma. Biba then calls on Mumei to kill Ikoma. She obeys his order due to Biba's captive vaccine, stabbing Ikoma who falls from the hayajiro into a coast far below.