If you loved Lupin III: The First, try Lupin the Third vs. Detective Conan
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Animation / Comedy / Crime territory. If that's the register that drew you to Lupin III: The First, the second film will land in a comparable space — through a different lens.
What Lupin the Third vs. Detective Conan is
A pair of thieves and a tiny sleuth race to solve the same mystery in a cross-franchise cameo reel. Conan Edogawa investigates a suspicious hunting accident while Lupin the Third plots to swipe an ornate royal crown. The collision feels less like a crossover and more like a theme-park stunt ride.

