Kaibutsu ōjo

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.

It's Hiro's first day of school and it does not go well. Then he discovers that there is an invisible man in the mansion. Hiro also discovers that he is half immortal due to Hime's Flames of Life.

Hime needs more servants as the two she has are not enough to do all her fighting. Liza Wildman is a half breed girl who saves Hiro from being killed by a truck. Her brother was murdered and she seeks to avenge his murder by trying to kill Hime.

Lize meets Hime and Hiro at Hime's vacation home on the lake. Soon they are attacked by fishpeople from the lake who are seeking immortality from Hime.

Reirei befriends Hime at school. Unfortunately she is really a vampire you attacks Hiro so that she can get to Hime.

Hime's sister, Sherwood, proposes a truce between the two of them. When Hime refuses, she and her allies are attacked by a plant monster.