"Ro-Kyu-Bu! SS" is the second season of the anime series "Ro-Kyu-Bu!" and continues the story of Subaru Hasegawa, a high school student who becomes the coach of a girls' elementary school basketball team. The narrative picks up after the events of the first season, with the Keishin Academy elementary school basketball team, known as the "Club," striving to improve their skills and compete in tournaments. Subaru remains central to the story, balancing his coaching responsibilities with his personal life and academic pressures.

The team consists of five main members: Tomoka Minato, the energetic and determined captain; Maho Misawa, a skilled player with a competitive edge; Airi Kashii, a shy but talented shooter; Saki Nagatsuka, the team's reliable center; and Hinata Hakamada, the youngest member with a cheerful personality. Each character faces individual challenges, both on and off the court, which are explored throughout the season. The dynamics within the team evolve as they work together to overcome obstacles and grow as players and individuals.

The plot introduces new characters, including rival teams and players, who add depth to the competitive aspect of the story. The Club participates in various matches and tournaments, showcasing their progress and teamwork. The season also delves into the personal lives of the characters, addressing themes such as friendship, perseverance, and self-improvement. Subaru's role as a mentor becomes more pronounced as he helps the girls navigate their challenges and develop their potential.

The narrative maintains a balance between lighthearted moments and more serious themes, with a focus on the characters' growth and their shared passion for basketball. The interactions between Subaru and the team members highlight the importance of trust and communication in achieving their goals. The season concludes with the Club reflecting on their journey and looking forward to future opportunities, leaving room for further development in their story.