 In order to pay for hospital bills Kiichi has turned to fighting in illegal underground matches called dark fights in which almost anything is allowed.Kiichi has become a mainstay in these fights, not only because of his outstanding victories but that he refuses to seriously injure any of his opponents, upholding his father's teachings of never killing anyone.During one particular match in which Kiichi was on the verge of losing, his uncle appeared only to see the progress of his nephew's training and to tempt him into using a killing technique on his adversary.