The Shadows of a Monster (Highschool dxd x Shadow Lugia Oc)

One night Mr.Himejima found a boy with white hair and light blue clothes. He takes in the boy then names him Platinum and raises him with Akeno. After a few years both Akeno and Platinum are part of Rias's peerage. Out of jealousy Rias kills Platinum. A few months later Akeno goes into depression and is about to kill herself when a familiar face returns.