Following a devastating war, Tokyo sinks into a post-apocalyptic wasteland. Two girls have sought refuge in an abandoned military tank located in the Suginami Ward, close to an abandoned riverbed. One girl, Mandara Legrand, struggles with a stuttering and repetitive speech, while the other, Becchin, battles pre-war hallucinations that persistently plague her mind.
In this destroyed city, there is no assistance from anyone, and the girls have no choice but to rely on themselves for survival. The duo must navigate their way through the undead, constant hunger, and despair, making do with what little resources they can scavenge from the rubble. As their quest for survival continues amidst the decaying landscape, their mental state slowly deteriorates.
