Princess Resurrection
Princess Resurrection English Dub
S1 E1:
Hiro goes to the mansion to look for his sister. While there he witnesses a girl about to have some rails fall on her. He pushes her out of the way but looses his life in the process. The girl turns out to be the Princess Of All Monsters and she tells Hiro she will revive him if he promises to be her servant for the rest of his life.