Knockout King: The Ring of Retribution Episode 21

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Knockout King: The Ring of Retribution Episode 21. Transmigrated into the past as a young man who shares his name, boxing champion Derek Zane has no choice but to enter the underground boxing circuit to earn quick money for his ailing father and the family business his mother sacrificed her life to protect. Amidst sweat and blood, he finally confronts his mother's killer—each strike a debt paid for her death—as he fights to claim the throne as the boxing legend of his era.