Two years ago, he got three scars on his forehead from Tsuneru during a fight. In a Championship, he got his lips torn off, a scar across his left eye and ear, and a scratch on his nose. That's when he was nicknamed, the "Human Dog" in awe of the lost skin on his lips.
To get revenge on his scars, he trains his pack to be reckless killers in order to defeat Tsuneru. However, almost ten of them are killed by the young German Shepherd.