Fist of the North Star: Soukoku no Garou - Hokuto no Kenrei Gaiden

Sinopsis

Rei, a man consumed by vengeance, travels the world in search of a specific individual. Once compassionate, he has become ruthless due to a past event that stripped him of his humanity. He believes that only by fulfilling his quest for retribution can he regain his former self. Until then, he exists as a lone wolf, fiercely confronting anyone who stands in his way.