Totsugeki! Ningen Sensha Limited Operations

The land of Japon has been split in two and thrown into war by two nations, the Empire of Japon and the Kingdom of Japon, who use biological weapons known as "Human Tanks" to fight their war. But now the war between these two has turned into a proxy war between the Human Tanks themselves.

The stage is a land not unlike modern day Japan - the land of Japon. The Empire of Japon and the Kingdom of Japon, two nations locked in war for an age, have finally agreed to a ceasefire to end the bloodshed.

To improve relations between the two countries, and due to the decrease of the radiotoxic particles that the Human Tanks use as fuel, the tanks themselves are about to disappear from all of Japon.

Fifty years since Human Tanks were first developed...

Our hero, Yatarou Shirahase, acting as an officer in the Imperial army, is dispatched on a mission to subjugate the Human Tanks. He must now battle an enemy of the same make as his own beloved company of Human Tanks.