The protagonist of the story is a former AT soldier whose squad, for reasons unknown, is stripped of their status near the end of the war and forced to fight as an infantry unit without armor and using only obsolete or old weapons. Basically they become a last stand unit that is not expected to survive. Episode 5: Battlefield shows us the reason why Mellowlink is in the position he is in. The challenges of fighting Armored Troopers out in the open eventually takes its toll on his squad and the majority of his squadmates are killed in fierce fighting with the enemy. His commanding officer Shoutaichou Shuepps, shields him from a pair of soldiers sent by the top brass to finish off the unit once and for all. Mellowlink the lone survivor then becomes a scapegoat from which the top brass all seek pin blame on him and his unit for anything that went wrong, ignoring the orders they gave to his squad. This becomes known as the Pranbandol Scandal and with the trap well laid Mellowlink storms out of the court, steals the AT rifle he used during the war as well as the dogtags of all his perished comrades. Escaping into the wilderness he plans his revenge on all the commanding officers that sentenced him and his unit to the miserable fate he now bears witness to alone.