The story begins with Hanzo Hattori checking on his comatose son, Shinzo. Although he knows that his son's body is alive, Hanzo laments his powerlessness in saving his son's soul. While he prays for his son's revival, Shinzo's soul flickers into his body. He tells his father that Amakusa's soul is still alive in the Makai (demon world), begging his father to stop the villain. Moments later, his soul is struck back into the Makai by Amakusa, once again leaving Shinzo's body lifeless. Enraged and in grief, he leaves to try and get his son's soul back.

In the era when Nazi Germany began a dangerous motion, a young man aiming for space appeared in this alternate universe "Berlin". His name is Walter, an arrogant man who fears nothing in this world. Together with Paul, a stubborn engineer, he completes the common sense flight battleship Kaiserburg, which is capable of escaping the atmosphere. However, they are chased by the German army because to this. The army has noticed Kaiserburg's overwhelming combat power! (Source: KADOKAWA, translated) *Note: Includes 1 extra chapter.*

A girl is sent to another dimension, where she finds OZN, a warrior with a unknown past.

At the conclusion of their long journey, Shibito and his beloved Yurihime disappear. However, Shibito goes through hell and comes back stronger than ever, ready to fight again in the age of war!