In '45, amidst the chaos of surrendering, Yuhi's mother and sister are killed by a Manchurian man. An orphan, he and his brother, Goshi, go to live with a prostitute named Machiko. Now 17, Yuhi embarks on the journey of revenge by becoming a professional boxer...! A story of the eternal separation of flesh and blood, as well as rekindling of old blood, a childhood friend named Aoba.