Wizards Meet Alchemists, Reapers, and Guardians

What would happen if The FullMetal Alchemist and the Spade Guardian(OC) were sent to a different world? Harry and his friends have the most interesting and entertaining fifth year at Hogwarts as their two new professors wreak havoc on a certain ministry witch. Learning new subjects instead of the expected defense won't be easy, and what does Truth have planned for them ?