"Bishōnen Tanteidan" is a manga series that blends mystery, supernatural elements, and psychological intrigue. The narrative centers around a group of exceptionally beautiful young men who form a detective agency to solve bizarre and often otherworldly cases. Each member of the group possesses unique abilities, which they use to unravel the enigmatic phenomena they encounter. The cases they investigate often involve strange occurrences, urban legends, and supernatural entities, challenging their intellect and resolve.

The protagonist, a young man with a sharp mind and an air of mystery, serves as the leader of the group. His calm demeanor and analytical skills make him a natural problem-solver, though his past remains shrouded in secrecy. The other members of the detective agency include a charismatic individual with a talent for persuasion, a quiet and observant figure with a knack for uncovering hidden details, and a flamboyant yet perceptive character who adds a touch of levity to the group. Together, they navigate a world where the line between reality and the supernatural is often blurred.

The series is structured around episodic cases, each presenting a self-contained mystery while gradually revealing deeper connections to the overarching plot. These cases often delve into themes of human psychology, morality, and the consequences of unchecked desires. The detectives frequently confront adversaries who exploit supernatural forces for personal gain, leading to tense and morally complex confrontations. As the story progresses, the group uncovers a larger conspiracy that ties their individual pasts to the strange phenomena they investigate.

The artwork complements the narrative with detailed character designs and atmospheric settings, enhancing the eerie and suspenseful tone of the series. The interactions between the characters are a key element, with their distinct personalities and dynamics adding depth to the story. While the focus remains on solving mysteries, the series also explores the personal struggles and growth of the detectives, providing a balance between action and introspection. "Bishōnen Tanteidan" offers a compelling mix of mystery, supernatural intrigue, and character-driven storytelling, appealing to fans of both genres.