In his home town Tedro Miyazaki is known as Terrible Tedro "the boy that can't do anything right". He works at Tech Shack an electronic repair shop owned by his godfather. One day out of the blue his school is attacked by space pirates accidentally activating the bracelet given to him by his father he summons a biological living suit of armor known as a Big Body. The armor increases his strength and speed to that of a god. Determined to use this new found ability to help his godfather, Tedro becomes a professional Big Body boxer under the secret identity "The Madness".