When third year middle school boy Hanaukyou Tarou's mother died, he moved to live with his grandfather in Tokyo. When he gets there, he is stunned by the gigantic mansion with its countless maids. He is the grandchild of the incredibly rich Hanaukyou family's head, Hanaukyou Hokusai. But since Hokusai has no heir, Tarou becomes head of the Hanaukyou family, which controls half of Japan!
The maids who look after Tarou are: Mariel the chief maid, Tsurugi Konoe in charge of security, Suzuki Ikuyo in charge of arts and Grace the computer expert and many more. These highly trained professional maids, all having special skills, form the Hanaukyou Maid Squad. And their only duty is to serve Master Tarou!