Joe isn't trying to be inspiring, he's a feral kid who fights because he has nothing else, and the show trusts you to watch him actually change. Danpei is a drunk who can't coach him legally, so their partnership becomes about two broken people deciding to stay broken together until boxing forces them to choose something else. The animation stutters and the pacing sags, but when Joe hits the ring, every punch carries the weight of someone with no other way out.
A street orphan with nothing to lose and everything to prove finds his calling in the boxing ring. Joe lives rough in the slums, drifting through petty crimes and aimless days until he encounters Danpei, a washed-up coach drowning in booze and regret. Danpei recognizes something in Joe's raw aggression and hunger: the makings of a true fighter. When Joe lands in a brutal juvenile detention facility, his path intersects with Rikiishi, a rival whose skill and discipline mirror everything Joe lacks. Danpei fights his own demons to push Joe toward greatness, but his tainted past becomes an obstacle they can't ignore together. What emerges is a story about transformation through sport, where two broken people find purpose in each other. Joe must rise from poverty and prison bars to become a boxer worth something. Danpei must confront whether a fallen man can ever truly be redeemed. Their relationship becomes the heart of it all: two underdogs searching for redemption on canvas and in life itself, one round at a time.