A teen detective? Is he some kind of child prodigy to have already started working? That being said, I always wonder why animes always have the main characters being in their teens or early twenty's. They depict those who are in their late twenty's as being ancient and near their twilight. Granted I don't watch many animes unlike many people here, but the ones I've seen have the main characters being really young and already doing adult stuff like Evangelion and Attack om Titan. People in their 30s and middle age people are sidelined as if they are pensioners. There are only few fully grown and mature adults who gets the spotlight.