"New Attacker You!" is a sports anime centered around volleyball, focusing on the growth and challenges of its main characters as they navigate the competitive world of high school athletics. The story revolves around Nami Hayase, a determined and passionate middle school student who dreams of becoming a top volleyball player. After transferring to a new school, Nami joins the volleyball team, where she encounters a group of talented but inexperienced players. The team struggles with cohesion and skill, but Nami's relentless drive and leadership inspire them to improve and aim for higher goals.

The narrative explores the dynamics of teamwork, personal ambition, and the pressures of competition. Nami's journey is marked by her rivalry with Midori Saki, a skilled and confident player from a rival school. Their interactions highlight the balance between friendship and competition, as both strive to outdo each other while respecting their shared passion for the sport. The series also delves into the personal lives of the team members, showcasing their individual struggles and motivations, which add depth to their development as athletes and individuals.

As the team progresses, they face increasingly challenging opponents, culminating in their participation in regional and national tournaments. The matches are depicted with a focus on strategy, skill, and the emotional highs and lows of competition. The series emphasizes the importance of perseverance, hard work, and the support of teammates in overcoming obstacles. Through its portrayal of volleyball and the personal growth of its characters, "New Attacker You!" offers a compelling and inspirational narrative for fans of sports anime.