Tetsuya Deguchi

Shohei Saji, a former member of the Roppongi street gang Lone Wolf, has left his old life behind and now works as a trainer at a boxing gym. When former gang member Inose is taken hostage by the Shinjo-gumi, Saji agrees to join the yakuza group in exchange for his friend's release. Forced to endure increasingly abusive treatment, he struggles to remain calm until one incident pushes him past his limit.

Following a tip, Manabu Yazaki loses his last money betting on the older "banba" horse "Unryu" (jockied by Makie, a legendary jockey's daughter) in a draft-horse race held in his childhood home of Obihiro on the island of Hokkaido.

After joining the Shinjo-gumi to save his former gang member Inose, Shohei Saji kills fellow member Ogata in revenge for the death of his friend Murasame and becomes a target of the organization. Seriously wounded while protecting Wakatsu, Saji is hidden away under the care of a mysterious man named Senba. When he finally returns, however, he discovers that betrayal and painful separation await him among the people he once trusted.