ReMember (KING Gonta)

After Japan loses the war to the United States, amnesiac Zaji wanders through the ruins of what was once a city. He cannot remember his past, only that something important is missing from his memory. Zaji discovers that his body knows how to fight, carrying martial arts skills built through years of training. Gin, who owns a bar frequented by occupying US soldiers, takes him in. As Zaji learns the extent of his strength, he tries to protect the helpless in a devastated society.