"Kindaichi Shōnen no Jikenbo R" is a sequel to the original "Kindaichi Shōnen no Jikenbo" series, continuing the adventures of Hajime Kindaichi, a high school student with a knack for solving complex murder mysteries. The series retains its focus on intricate, puzzle-like cases, often involving locked-room scenarios, elaborate alibis, and a cast of suspects with hidden motives. Hajime, despite his unassuming and often lazy demeanor, possesses a sharp intellect and deductive reasoning inherited from his grandfather, the renowned detective Kosuke Kindaichi. He is frequently accompanied by his childhood friend, Miyuki Nanase, who provides emotional support and occasionally assists in investigations.

The narrative structure of "Kindaichi Shōnen no Jikenbo R" follows a case-of-the-week format, with each arc spanning multiple episodes. The cases are typically set in isolated or confined locations, such as remote islands, mansions, or cruise ships, heightening the tension and limiting the suspects to a small group. The series emphasizes the process of deduction, with Hajime piecing together clues, interrogating suspects, and ultimately revealing the culprit in dramatic confrontations. The mysteries often delve into themes of revenge, betrayal, and the darker aspects of human nature, with the culprits' motives frequently rooted in past tragedies or injustices.

Key recurring characters include Inspector Isamu Kenmochi, a police officer who often collaborates with Hajime, and Saki Ryuji, a rival detective who occasionally challenges Hajime's methods. The series also introduces new characters and antagonists, each with their own unique connections to the cases. The tone remains consistent with the original series, blending suspense, drama, and occasional moments of humor, particularly through Hajime's interactions with Miyuki and his tendency to procrastinate until the final moments of a case.

The overarching narrative of "Kindaichi Shōnen no Jikenbo R" does not follow a continuous storyline but instead focuses on standalone arcs, each with its own self-contained mystery. However, there are occasional references to past cases and character development, particularly in Hajime's growing reputation as a detective and his evolving relationships with those around him. The series maintains a balance between episodic storytelling and the gradual progression of its characters, ensuring that each case feels fresh while still contributing to the larger world of the series.