In Japanese boxing, the blue corner of the ring is typically assigned to the lower-ranked fighter. It’s the domain of the underdog, and Nobuto Urita (Kenichi Matsuyama) knows it well.

An aging pro on a permanent losing streak, Nobuto can analyze fights in meticulous detail, but he seems incapable of winning one himself. By day, he works as a trainer at a scruffy gym, where he teaches fitness classes to middle-aged women and conceals his inner regrets behind a veil of good humor.

Those disappointments include the fact that he’s been eclipsed by his old high school pal, Kazuki (Masahiro Higashide), who looks set to become the gym’s first champion in decades and has won the affections of Nobuto’s childhood sweetheart, Chika (Fumino Kimura).