The story is about Mimi Hijiiri, a student with just one school year remaining, who decides to revitalize a volleyball team low on morale from the death of one of its team members from an accident.
The story is about Kozue Ayuhara, a girl who transferred to Fujimi College and tried out for the school volleyball team. She develops a friendship with her teammate Midori Hayakawa, and her talents impress coach Hongō more and more each day. Though she showcases extraordinary volleyball skills, she makes enemies with Yoshimura, the star of the current team. Kozue discovers that being at the top would bring stress, incompatibilities and other dilemmas into her life. Her high expectations of becoming the best volleyball player in the school, Japan and eventually the world, set the tone for the drama to follow.
After middle school, with its bullying and nicknames, Uka Ishimori is excited for a fresh start at Hachimitsu High School. Kai Miura, a cool and uninhibited boy, sits next to her in class. Uka remembers she met Kai in middle school and with a single word, he had convinced her to attend Hachimitsu. Though he’s popular, Kai supports Uka in her efforts to fit in with her new classmates.
Attacker You! is the story of ambitious and energetic 13-year-old junior high schoolgirl You Hazuki (variously known as "Mila," "Jeanne" or "Juana" in Western dubbed versions of the anime), who moves to Tokyo from Osaka to live with her father Toshihiko, a cameraman recently returned from Peru, and attend school. You's mother is not in the picture, having left when You was very young. Also living with You and her father is her younger brother Sunny, who is very attached to his older sister and tends to follow her everywhere she goes, including to school and to her volleyball matches. You is also curious about Kyushi Tajima, the pretty blonde woman whom she sees covering volleyball games on television, and about why her father becomes very angry whenever You mentions her.
Etrafına korku salan Rintaro, açık fikirli Kaoruko ile tanışır ve bu sıra dışı ikili, giderek yakınlaşır. Tek sorun ise birbirine komşu olan liseleri arasındaki düşmanlıktır.