"Attack No. 1" centers on Kozue Ayuhara, a determined and passionate high school student who aspires to become a top volleyball player. The series chronicles her journey from a novice to a skilled athlete, highlighting her struggles, growth, and perseverance in the competitive world of volleyball. Kozue faces numerous challenges, including intense training, rivalries, and personal setbacks, but her unwavering dedication and love for the sport drive her forward.

The narrative begins with Kozue joining her school's volleyball team, where she quickly realizes the gap between her skills and those of her teammates. Under the guidance of her coach and the support of her friends, she begins to improve, showcasing her natural talent and hard work. The series delves into the dynamics of team sports, emphasizing teamwork, discipline, and the importance of overcoming obstacles. Kozue's rivalry with Midori Hayakawa, a talented and confident player, adds depth to the story, as their competitive spirit pushes both athletes to excel.

As Kozue progresses, she faces personal challenges, including balancing her academic responsibilities with her athletic ambitions and dealing with the pressures of competition. The series also explores themes of friendship, loyalty, and self-discovery, as Kozue learns valuable life lessons through her experiences on and off the court. Her journey takes her to national and international stages, where she competes against formidable opponents and continues to grow as a player and individual.

The supporting characters, including Kozue's teammates, coaches, and family, play significant roles in her development. Their interactions and relationships add layers to the narrative, creating a well-rounded portrayal of Kozue's world. The series captures the emotional highs and lows of competitive sports, offering a realistic and engaging depiction of the challenges faced by athletes.

"Attack No. 1" is a compelling sports drama that combines intense volleyball action with heartfelt character development. It stands as a classic in the sports anime genre, celebrated for its inspiring story and memorable characters.