The Boxer (Manhwa) Wiki

While searching for a final prodigy to train, legendary boxing coach K stumbles across a bewildering scene of an apathetic teenager simply standing still as his bullies throttle him. But Coach K sees more than this—sees the precision, grace, and uncanny perceptiveness in the boy’s movements. He knows right away that this is the fighter he’s been waiting for. Yet when he tries to recruit him, the boy with the lifeless eyes only asks one question: “Is it any fun? Hitting people… Is it fun?”

Source: Yen Press