Ryoji Suzuki

In a small nook of Kawasaki Private investigator 591 and adultry specialist investigator 522 embark on separate investigations that leads them both to the same beautifician.

For 60 years, the group of detectives known as "Detective Office 5" has raised the bar for detective work. The agents of Detective Office 5 are a group of stellar detectives lead by the genius code breaker Detective 507. When an unknown client enlists 507 to crack his most difficult programming code yet, the detective embarks for Shanghai where he crosses paths with a sniper, an informant, the head of the Blue-Dragon Mafia, and beautiful singer on the run, Meilan. As 507 stumbles deeper into a twisted quagmire of intrigue he discovers the sad truth behind the mystery.

A precarious loner sneaks into a blind woman's home and begins living there without her noticing. Meanwhile, the woman mourns her recently deceased father and struggles to remain connected to the world.

Rion, a naive, loudmouthed teenager, investigates a host club full of vampires when she suspects they must be related to the disappearance of a lot of people in the neighborhood, including her best friend. In the process she begins to befriend them, especially the leader Suou, with whom she develops a romantic relationship.

This anthology-style mystery series is part of the D‑5 PROJECT, centered around Detective Office 5 - a long-running private detective agency in Kawasaki. Each detective is known only by a number rather than a name (e.g., Detective 596, 532), with standalone stories featuring different characters and surreal, quirky cases.