"Attacker You!" is a sports anime centered around volleyball, focusing on the journey of Yu Hazuki, a determined and passionate middle school student. Yu moves to Tokyo to live with her father after her mother's passing, seeking a fresh start. Her love for volleyball drives her to join the volleyball team at her new school, where she encounters a group of talented players and rivals. The series explores her growth as an athlete and her relationships with teammates, opponents, and mentors.

The narrative highlights Yu's struggles and triumphs as she navigates the competitive world of volleyball. Her fiery personality and relentless work ethic set her apart, but she must also learn teamwork and adaptability to succeed. Key characters include Nami Hayase, a skilled and composed player who becomes both a rival and a close friend, and Coach Nakahara, whose guidance helps shape Yu's development. The story also delves into the personal lives of the characters, addressing themes of friendship, perseverance, and self-discovery.

As the series progresses, Yu and her team face increasingly challenging opponents, culminating in high-stakes matches that test their skills and resolve. The anime balances intense volleyball action with emotional moments, portraying the dedication required to excel in sports. Through its focus on Yu's journey, "Attacker You!" captures the spirit of competition and the importance of passion and determination in achieving one's goals.