Soul Eater's Fairy Tail's and Host Club's
Ouran High School Host Club,
Lucifer is the most powerful witch in existence and she wants revenge on 3 certain people, Master Makarov, Lord Death and Mr. Suoh.
She finds and kills Master Makarov and Lord Death and is going to kill Mr. Suoh for her revenge leaving the Fairy Tail guild and the students and teachers of the DWMA all in shock.
Death The Kid, along with Maka, Soul, Black Star, Tsubaki, Liz and Patty set out to find Lucifer and kill her,
Natsu Dragneel, along with Lucy, Grey, Erza, Happy and Juvia set out to find Lucifer and defeat her.
As the 2 groups set out to find the witch and stop her before she kills her next and last target, Mr. Suoh.
Upon arriving in Japan each group ends up at Ouran Academy and more specifically, the abandoned music room, Music room 3.