Orphaned after his mother’s brutal murder by a yakuza gang, Yoichi Shindo learns the truth—his estranged father was the gang’s founder, and his mother’s death was the result of a betrayal by the organization’s No.2, Mikado. Determined to exact revenge, Yoichi infiltrates a secret academy where future yakuza leaders are trained. In a world where everyone is an enemy, he must navigate deadly power struggles, sharpen his strength, and climb the ranks—all while keeping his true intentions hidden. Fueled by vengeance, Yoichi’s journey to the top begins. Will he become the ultimate ruler of the underworld, or will he be consumed by the darkness he seeks to destroy?