"Kogyoaika Volleyboys" centers on a group of high school boys who form a volleyball team at Kogyo Academy, a school with no prior history of competitive sports. The protagonist, Haruto Tachibana, is a first-year student with a natural talent for volleyball but lacks formal training. Inspired by a chance encounter with a professional match, Haruto decides to revive the school's dormant volleyball club. He recruits a diverse group of classmates, each with unique personalities and varying levels of athletic ability, to join the team.

The narrative explores the challenges of building a team from scratch, focusing on the players' growth both individually and collectively. Haruto's determination and leadership drive the team forward, but they face significant obstacles, including a lack of resources, skepticism from the school administration, and formidable opponents in regional tournaments. Key teammates include Kaito Soma, a former basketball player with raw athleticism but no volleyball experience; Renji Fujimoto, a quiet and analytical setter with a deep understanding of the game; and Yuto Nakamura, a hotheaded but passionate player who struggles with teamwork.

As the story progresses, the team undergoes rigorous training, learning to overcome their weaknesses and develop cohesive strategies. The matches are depicted with a focus on the technical aspects of volleyball, highlighting the importance of communication, strategy, and perseverance. The series also delves into the personal lives of the characters, exploring their motivations, insecurities, and relationships outside of volleyball. Themes of friendship, resilience, and self-discovery are woven throughout the narrative, as the players strive to prove themselves in a sport that demands both physical and mental strength.

The team's journey culminates in their participation in the national high school volleyball tournament, where they face off against elite teams with years of experience. The series balances intense sports action with moments of introspection, showcasing the emotional and psychological toll of competitive athletics. Through their struggles and triumphs, the Kogyo Academy volleyball team embodies the spirit of determination and the transformative power of teamwork.