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When Yuujirou was 16 years old, he went to war to fight and develop his skills. He was in the Vietnam War, where he fought against the Americans. After the famous "Bloody Mary" bombardment plan was completed, Yuujirou survives as one of the two rebels. The second person is a woman named "Jane". After a short conversation, she suggests Yuujirou to have sex, but he refuses. She laughs at him and tries to dominate him, but the Ogre catches her by surprise and says that he is the one who rules and could kill her at any time. Yuujirou and Jane become companions.

While American soldiers march and watch the ruins after the "Bloody Mary" operation, Yuujirou lurks among the ruins and attacks General Sam Gary. He kills him, takes his skin off his face, puts it on his own and shows himself to the other soldiers, pretending to be semi-conscious. The soldiers take him to some headquarters, thinking he's their general, who needs help. When in fact, their general is long dead and Yuujirou has made his way to the center of the nearby American headquarters. He slaughters the army in the middle of the building and meets a soldier named Gerry Strydum. During this time, the American army gathered around the headquarters to shoot the whole building with cannons to get rid of Yuujirou. Suddenly, Jane shows up with a big barrel of explosives. She tells Yuujirou that the barrel will cause a big explosion when the army will start shooting. Jane, suspiciously, finds a secret passage to the underground exit and then starts to run away with Yuujirou. Unfortunately, the Ogre guessed Jane's true identity. Her real name is Diane Neil and she's a Canadian spy of the United Nations. Her task is to lead Yuujirou through this underground passageway, where the UN army awaits the end. Yuujirou rapes Diane Neil to take revenge on her, then goes outside and destroys the army waiting for him. Nine months later, Diane bears his child.

Yujiro vs oliva
Yuujirou fighting Biscuit Oliva.

The anime shows another retrospective from the time when young Yuujirou fought on the battlefields. America still tries to get rid of Yuujirou and sends all its best units against him (the Green Berets, the SEAL, and the Delta Forces). However, the young fighter defeats all of them. Ultimately, the Americans turn to Biscuit Oliva, who is a powerful man and a vip convict in the Arizona prison. Oliva is hired to get rid of Yuujirou under the pretext of eliminating some drug cartel dealer. Oliva introduces himself to Yuujirou when they meet, and the young fighter lets him know that he knows who Oliva is. The prisoner is happy with this fact and starts a short fight with him, but after a while Yuujirou runs away, saying that he prefers to leave Oliva for another time. At the end, America decides to form an alliance with Yuujirou. In other words, USA is completely defeated by one man, Yuujirou Hanma.

Yujiro emi eiichi
Yuujirou, Emi and Eiichi.

Yuujirou once appeared at a big and expensive banquet. In this place, for the first time he meets Emi Akezawa, who comes there with her husband Eiichi Akezawa. Yuujirou and Emi almost immediately notice each other in the crowd and starts to look at each other. Yuujirou undresses her with his eyes, so jealous Eiichi enters and starts talking to Yuujirou. Eiichi spills champagne on his suit, for which Yuujirou gives Emi a kiss. Angry Eiichi attacks him, but Lorion Grassy, a Brazilian Judoka, stops them.