Bodyguards

The triwizard tournament is happening in Hogwarts and due to an increase of Death Eater activity, Dumbledore decides to sign in bodyguards to protect the competetors and the rest of the school. He decides to call upon the Oriental Academy for Magic.
This will be a multi-crossover between Harry Potter, D.Gray Man, Ouran, To the Beautiful You (KDrama ver), Otomen (JDrama ver) and VIXX (KPOP)