After giving his life for Kairi, Sora ended up in a world of Heretic Gods and Campione. In fact, he becomes the 8th Devil King. But he's not interested in reigning. He just wants to have an adventure and meet new people while he finds a way home! The mortal magic organizations will end up with more headaches than ever...

After Roxas and Axel rebel against Organization IIIX and attempt to destroy Kingdom Hearts, they find themselves in a world of gods and god slayers. Normally they wouldn't care, since the experience resurrected their friend, Xion, but with gods and god slayers starting to set their eyes on her, the two will find themselves in a giant battle royale, with Xion as the ultimate prize.

After the defeat of Xehanort he had thought everything would go back to normal, why he even changed schools to focus in his studies, then why did it seemed like trouble always find him? And what was that he was hearing about Campiones and Heretic gods?