Fight of the Gamblers

男の紋章　風雲双つ竜

Also known as Otoko no monshô - Fûun futatsu ryû, Fight of Gamblers, A Man's Crest - Winds of Change for Two Dragons, おとこのもんしょうふううんふたつりゅう

Ryuji Oshima, a gambler, kills Saiga in self-defense, and considering himself unfit to lead men, secludes himself in a temple to atone for his misdeeds. At home, when his mother, the boss of a construction gang, bids for and gets the job of building the Town Hall, other gangs set out to disrupt her business and try to kill her.