Strike Angels

Yukina Himmeragi isn't your average high school girl or princess...she's you guardian angel living a double life might be hard but she get through it,after her moms death everything seems different and it was hard to get through it sometimes then one day a new student came named Kaneki and after their accounting in the library he tells her he's her butler that her father hired and everything goes down hill for her and her friends when things from hell emerge even the king of hell himself...