Ninja Girls Vol. 8 (manga)

Disfigured by a strange horn in the middle of his forehead, Raizo is a complete outcast. But then he meets a beautiful female ninja, who introduces him to his amazing destiny: he is the last living descendant of the royal family! She swears her loyalty to him, promises to help him regain his throne... and introduces him to his ninja servants, a group of glamorous, gorgeous, and super-cool ninja warriors!