Fiancé Wa Monster!?

Hitomi Miku goes to live in a mysterious house where she meets Rauto, the young and sexy master of the house. There she discovers that the house is full of monsters! Rauto gives her a special necklace and she suddenly transforms and knocks out an evil monster who possesses a girl! What\\\'s going on? Becoming Rauto\\\'s maid and fiancé? \\\"I\\\'ll knock out everyone\\\'s heart.\\\"