HP – DGray-man Crossover Challenge
HP as Kanda
Vernon Dursley has enough and does not want a magical child in the house anymore so he just threw Harry into a nearby river (Harry's age between two and eight)
Harry's magic saves him and he vanishes in a bright light
In one of his travels (in this new world) he comes across a strange crystal, a so-called innocence, he becomes an exorcist and meets his future wife or love of his life who is also an exorcist
His beloved and he die while fighting akuma, both of them are then used for the Second Exorcist Program
About twenty years later 'Yu' is born and meets Alma Karma
He and Alma become friends, but Alma goes on a rampage killing all scientist and Yu kills Alma
Nine years later they fight once again and at the end Allen sends both of them through a portal to Kanda's original world
Alma dies in his arms and Kanda is left alone in an unknown world (he has Mugen with him)
Yu Kanda is found by Luna Lovegood (or someone else, can be chosen) and goes to Hogwarts as an transfer student (3rd or 4th or 5th or 6th year, can be chosen)