If you loved Detective Conan: Sunflowers of Inferno, try LUPIN THE 3rd vs. CAT'S EYE
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.
You already loved

Detective Conan: Sunflowers of Inferno
→
Try this next

LUPIN THE 3rd vs. CAT'S EYE
What they share
Both films are directed by Kobun Shizuno, and they both carry the playful mood tag, and they sit in Adventure / Animation / Crime territory. If that's the register that drew you to Detective Conan: Sunflowers of Inferno, the second film will land in a comparable space — through a different lens.
playful
What LUPIN THE 3rd vs. CAT'S EYE is
Lupin III gets into a paint-splattered fight. He competes with the Kisugi sisters for a triptych. It predictably gets chaotic.