Oooh boy, this is a high-tier Detective Conan OVA. The title is a bait-and-switch, though, because there's literally only one scene where Sonoko shows up as the detective. But that's OK, though, because this OVA is basically a metanarrative about how they write anime-original Conan material, and that rules. There's a great scene in the middle where Haibara breaks down how ridiculous the concept and execution of cases like this are, and the fact that the case is so utterly simple and staged only adds to that. Until, suddenly, it takes a left turn and it isn't. There's just some great material here that would never,ever be in the main series.

Also, it's definitely not perfect. The introduction is too drawn out, for one. The endgame for the mystery is a bit eye-roll inducing if you came here to see Sonoko shine, and the consolation prize for that also sidelines Sonoko. Because of the nature of the thing, it's also a little bit repetitive.

I totally recommend this for people who like Detective Conan and want a bit more on the side. Not just for completiionists!