Monsters from a meteorite that fell to Earth killed my family and ruined the princely estate. I am the only survivor of the family, and now a poor cadet of a military school, after which I have the chance to join the personal guard of Her Imperial Highness the Heavenly Princess and become a mecha pilot - a fighting machine given to us by an extraterrestrial civilization. This is my chance to take revenge on the bloodthirsty creatures and restore the good name of the family. For the father, a once eminent officer of the fur guards, was unable to protect either his relatives or the emperor’s relative who was visiting at that fateful hour.