14 Years ago, when Shun was born, the entire village suffered a massacre by people from the demon world. Shun and Ikki's biological father and mother died trying to save the two. Their mother's last will was for the two to become saints. Ikki fled the village with Shun and was taken in by the director of the orphanage. From then on, Ikki concealed Shun's true gender. 14 Years later, after the battle in the underworld, Shun rescued Seiya who was killed by "Pluto". Half a year later, everyone learned that Shun Chang was the real Pluto, and the "Pluto" at that time was actually Hadira, the second brother of Hades. The underworld reconciled with the human world. Everyone returned to Japan to start a new life. However, the good times did not last long and a new war came...