Masked Maid | | The protagonist is Fujihara Nako, the eldest daughter of a super-rich family. The plane her parents were on suddenly disappeared mysteriously, and Nako can only obtain the right to inherit property when she is 18 years old. In order to protect her direct granddaughter, Nako's grandfather Fujihara Zenjuro selected two people from his "Maid Kingdom (actually the Ninja Kingdom)" who are both good-looking and skilled. A first-class ninja with special skills serves as Nano's bodyguard and maid who takes care of daily life. Of these two ninjas, one is a healing maid who looks like a big sister, and the other is a muscular man and psychopath who wears a mask all day long... Can the weird "maid" who claims "I will do anything for my master" protect the safety of her mistress?