OVA
Description
Coach Mukōda is the owner and head trainer of Mukōda Gym, the boxing club where the protagonist Kosaku Hatanaka trains. As the person who discovered Kosaku's raw talent, he is the one who encouraged the young man to drop out of high school and pursue a professional boxing career. In many ways, he feels a deep sense of responsibility for the difficult path he has placed Kosaku on, which fuels his determination to see the boxer succeed despite all obstacles.

In personality, Coach Mukōda is pragmatic, gruff, and perpetually frustrated, yet he possesses a stubborn loyalty that prevents him from ever truly abandoning his fighter. He has a short temper, especially when dealing with Kosaku's lack of self-control, and is often shown dragging the young man out of restaurants or yelling at him for breaking his diet. His gruff exterior, however, masks a genuine care for Kosaku's well-being, and their relationship carries the weight of an unspoken father-son dynamic. The coach knows the sacrifices the sport demands on a personal level, as his own devotion to boxing is implied to have contributed to the collapse of his marriage.

The coach's primary motivation is to salvage Kosaku's career and see his fighter live up to his potential. He has given up on Kosaku countless times in moments of exasperation, but a miracle victory or a sign of genuine effort always convinces him to return and continue training the young boxer. He is also deeply invested in the practicality of the sport, constantly concerned with weight management and the strategic implications of moving up weight classes, which he believes Kosaku does not have the proper frame for.

Within the story, Coach Mukōda serves as the voice of harsh reality and boxing expertise. He provides the grounded counterpoint to Kosaku's emotional and impulsive nature, as well as to Sister Angela's more idealistic encouragement. He has a better understanding of Angela's dilemma as a nun than Kosaku does and often tries to convince his boxer to stay away from the convent to avoid complications. However, he is just as ineffective at controlling Kosaku's heart as he is at controlling his appetite. He frequently finds himself allied with the Mother Superior of Angela's convent, as both authority figures share the common goal of keeping the two young people focused on their respective vocations rather than on each other.

Regarding his role in the gym, he is the central authority figure, though he is often supported by his assistant, Ishida. While the coach's history as a former professional boxer is established, his notable ability lies not in his own fighting prowess but in his sharp understanding of boxing strategy and his persistent, if often unsuccessful, efforts to instill discipline. He recognizes that Kosaku possesses a naturally powerful punch, which he considers the young man's greatest asset, and he constantly tries to build a winning strategy around that core strength.

Throughout the narrative, Coach Mukōda remains a largely static but essential supporting character. His development is subtle, manifesting as a gradual acceptance that he cannot simply control Kosaku but must instead adapt to his fighter's unique challenges. His arc is one of enduring patience; he is a man who has seen his own dreams partially derailed but continues to invest his hopes in a younger generation, learning to appreciate small victories and the rare moments when his troublesome protégé finally gets things right.