Regaining his will to live, Shiro returns to the Japan Branch with Rin and Yukio. Shiro offers to leave the twins with Mephisto under the assumption that he has a plan to raise Satan’s children. However, Mephisto reminds Shiro of the “promise” they once made. Mephisto later negotiates with Satan, who lost his body and returned to Gehenna, to stop harming humans. However, Lucifer appears with his power returned…