Description:

Rei is a ruthless man who is traveling the world in search of a certain someone... But Rei was not always ruthless an uncompassionate, it's vengeance the one who stripped Rei from his humanity, and he won't be able to become a normal human being until that vengeance is fulfilled. Right now, he can only roam the world as a furious lone wolf, a lone wolf who preys on those who oppose him. (Source: MU)

Alternative Titles:

蒼黒の餓狼 －北斗の拳レイ外伝－, Rei Gaiden: Soukoku no Garou, Fist of the North Star: Rei Side Story - The Dark Blue Hungry Wolf, Bloody Wolf's Darkness Blue: Fist of the North Star Rei Side Story, Black and Blue Hungry Wolf - Fist of the North Star: Rei Gaiden