In the skies above a world analogous to ours in World War II, a dragon flies for the first time since the age of myths, controlled by a human master to whom he owes everything.

The successor of the Tsujimura clinic, Motoharu has always held his childhood friend, Hazumi Akira, close to his heart. He confessed to Akira and then was rejected. Even so, he still entered the same univers...