Conan and Heiji actually feel like friends here instead of rivals solving cases. The mystery is almost an excuse to watch them eat their way through Osaka, trade barbs, and accidentally stumble onto something weird because they're too busy laughing at each other. If you've ever wanted Case Closed to stop solving murders for five minutes and just let its characters breathe, this is what that looks like.

Set after the events of the 14th Case Closed film, The Lost Ship in the Sky, this one-episode OVA has Heiji Hattori inviting Conan to share an okonomiyaki dinner. Released as a special alongside that movie, it pairs a newly made episode with a selection of earlier episodes from the franchise. The special is classed as a mystery.