Oshiri Tantei Movie 6: Star and Moon

Butt Detective is tasked with a perplexing disappearance: a relative vanished during a prominent idol competition held on Stardust Island. His investigation leads him to uncover a clandestine operation by the Phantom Thief Academy, led by the enigmatic Phantom Thief G. The island setting provides a vibrant backdrop for this unfolding conspiracy, as the Academy secretly executes a plan known as the Dark Age Plan.

To infiltrate the organization, Butt Detective adopts a new persona as an idol, navigating the competitive world of Stardust Island's entertainment scene. His path intersects with Phantom Thief U, who seeks to reclaim the Moonlight Stone from G. This unlikely alliance suggests a complex interplay of motives and shifting allegiances, promising a narrative focused on intrigue and uncovering hidden truths within a dazzling, yet potentially dangerous, environment.