"Backflip!!" centers on the journey of Shoutarou Futaba, a high school student who discovers a passion for men's rhythmic gymnastics after witnessing a captivating performance by the Ao High School team. Inspired by their artistry and athleticism, Shoutarou joins his school's newly formed gymnastics club, despite having no prior experience. The series explores his growth as he navigates the challenges of mastering the sport, forming bonds with his teammates, and striving to compete at the national level.

The narrative highlights the dynamics within the team, focusing on the diverse personalities and motivations of its members. Ryouya Misato, the team's stoic and skilled captain, serves as a mentor figure, while Shousuke Onagawa, a cheerful and energetic member, provides comic relief and camaraderie. Other key characters include Koutarou Watari, a former soccer player with natural athleticism, and Tsukidate, a reserved but dedicated gymnast. Together, they work to overcome personal struggles, refine their techniques, and build trust as a team.

The plot progresses through their training sessions, competitions, and interpersonal conflicts, emphasizing themes of perseverance, teamwork, and self-discovery. The series balances intense gymnastics routines with moments of lighthearted humor and emotional depth, offering a well-rounded portrayal of the characters' journeys. As the team faces increasingly formidable opponents, their determination to succeed and their shared passion for the sport drive the narrative forward, culminating in their pursuit of excellence on the national stage.