Trickster

Kogorou Akechi runs a private investigation firm called the Boy Detectives' Club, which takes on a wide range of cases. Kensuke Hanasaki, a junior member, stumbles upon Yoshio Kobayashi, a boy with a rare condition that prevents him from dying, and convinces him to join the team in exchange for help finding a way to reverse his condition. As they work on cases together, Yoshio gradually warms up to the group, despite his initial apathy towards people. The Boy Detectives' Club also faces threats from a mysterious entity known as "The Fiend with Twenty Faces.