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In Osaka, three troubled young kids, Kanako, Atsushi and Kenji, are hanging out together all the time. One day Kenji who lives in an orphanage is sold to a yakuza and their friendship has to come to an end. 25 years later, Kanako is married to Atsushi who is an incompetent yakuza. They have 3 daughters. Kenji is a competent unbeatable yakuza. Atsushi, who sucks at everything, for the first time gets a dangerous mission to kill a thug who has attacked the office of his yakuza group. Kenji, who has advanced to the first lieutenant position, by mistake kills a dumb-ass son of the head of Tokyo Yakuza, which triggers a battle between Osaka and Tokyo Yakuzas. Then, Kenji meets Atsushi in 25 years.