Peaceful scenery passes by outside the car window, but Azuma has no idea that the kind old man giving him a lift toward the island fortress is Guy himself. Meanwhile, back at their hideout, Kogane and the others are being attacked, and Matobai and Tsuwabuki realize that Azuma is gone. Hiiragi and Kinoa say that until he comes back with Kaoruko, they're on their own, but Matobai's subdued gaze is fixed on the Buranki Batolov.
Kaoruko has been trying to find a way to see her father again ever since he left her at a boarding school in Taiwan. One day, Guy tells Kaoruko that her father reunited with her mother by going up to Treasure Island in a Buranki that still had its brain. Sensing that Kaoruko, despite her brave act, really wants to see her parents again, Guy makes a proposal that will allow him to use her feelings to serve his purposes...
It’s been ten years since Azuma Kazuki has been in Japan, and upon his arrival he is taken prisoner by a group of armed men. Azuma is saved by his childhood friend, Kogane Asabuki, thanks to a living weapon she wields on her right hand, known as a Bubuki. Learning about these weapons, Azuma becomes a Bubuki wielder himself and sets out on a journey.