Majestic Prince

In the late 21st century, humanity abandons Earth and starts living in space. To adapt to this new environment and fight the hostile aliens near Jupiter, genetically enhanced children known as "Princes" are created and trained to pilot advanced combat robots called "AHSMB" (Advanced High Standard Multipurpose Battle Device). The story follows one of these teenage "Princes," Hitachi O Izuru, as he attends school in the academic city of Grandzehle.