A kid whose father was a washed-up boxer becomes obsessed with boxing not because it's cool, but because it's the only way he knows how to love him. The show commits entirely to Genki's stubborn belief in his dead father's strength, even when every adult in his life is telling him to let it go. That's not a sports anime about winning tournaments, it's about a child keeping someone alive through sheer force of will, one round at a time.
Young Genki grows up with only his father, a once-proud boxer now drifting from town to town. When his father dies, Genki's grandparents take him in with one condition: no boxing. They've seen enough of the sport destroy their family. But Genki can't let go of his dream. He trains in secret, carrying his father's legacy in his fists while hiding the truth from the people who raised him. Caught between duty to his grandparents and devotion to his father's memory, Genki navigates his teenage years searching for a path forward. He crosses paths with kindred spirits along the way: a teacher who reminds him of his lost mother, rivals who push his abilities, and mentors who see his potential. Each encounter tests whether he can chase his dream without breaking the hearts of those trying to protect him. This is a story about a kid fighting to honor the past while carving out his own future. The ring becomes both his sanctuary and his battleground, where every punch lands heavier because of what it means to be Genki Horiguchi's son.