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S1 E1: Taiga, the eldest son of Gunji Washio, the president of the Naito Shinjuku family - Japan's oldest Yakuza family with a tradition of hereditary succession. Although he is still in elementary school, he is trained by Reij to be the heir. However, compare to his father wild personality, Taiga is a crybaby and timid, and feels uneasy about becoming the heir. Then, Gunji's younger brother, who was thought to be dead, assassinates him. The Naito Shinjuku family finds itself in a tight spot. Meanwhile someone kidnaps Taiga...