"I'll/CKBC" is a sports anime centered around high school basketball, focusing on the struggles, growth, and camaraderie of its characters. The story revolves around Kiyoharu Hidaka, a former middle school basketball prodigy who quits the sport after a devastating loss and a personal tragedy involving his best friend, Subaru. Kiyoharu's passion for basketball is reignited when he transfers to Mizuho High School and encounters a group of players with varying skill levels and motivations. Among them is Subaru, who has also transferred to Mizuho and is determined to rebuild their friendship and shared love for the game.

The narrative explores the dynamics of the Mizuho basketball team as they strive to compete at a national level despite their lack of experience and resources. Kiyoharu's natural talent and leadership become pivotal in shaping the team, but his journey is marked by internal conflicts, self-doubt, and the pressure to live up to his past reputation. Subaru, on the other hand, serves as a grounding force, balancing Kiyoharu's intensity with his own steady determination and teamwork.

The series delves into the challenges of high school sports, including the physical and emotional toll of training, the importance of teamwork, and the personal growth of each player. Key themes include perseverance, redemption, and the bonds formed through shared goals. The supporting cast, including teammates and rivals, adds depth to the story, highlighting the diverse motivations and backgrounds that drive individuals to excel in basketball.

"I'll/CKBC" combines intense basketball action with character-driven drama, offering a realistic portrayal of the sport and the personal journeys of its players. The series emphasizes the importance of resilience and collaboration, making it a compelling narrative for fans of sports anime.