This is fan service in the best sense: two thieving crews from the same era finally forced into the same frame, and the movie knows exactly why you clicked. Hitomi, Rui and Ai are chasing the Michael Heinz 'Girl and the Flowers' canvases because their father is somewhere inside those clues, and the second they realize Lupin wants the same paintings, the heist becomes a grudge match. The character chemistry is the whole meal, the Kisugi sisters playing it earnest and personal while Lupin treats the job like a party he crashed. Jazzy score under the mayhem, heists staged with real direction, tone kept light on purpose. The CGI is the tax you pay, stiff faces from bad angles and motion that does not love being paused. Worth it anyway, because you will grin the first time both crews reach for the same frame.

Three sisters who operate as phantom thieves find themselves on a collision course with the world's most famous gentleman burglar. Hitomi, Rui, and Ai have been hunting for paintings from a mysterious series called "Girl and the Flowers," each canvas a potential breadcrumb leading them toward their vanished father. When they discover that Lupin the 3rd is stalking the same artworks, the stakes shift from personal mystery to high-stakes competition. Lupin lives for freedom and romance, while the Cat's Eye sisters, who also run a café by day, are driven by the hope that these paintings hold answers about their father. As both parties circle the same three canvases, a long-buried secret hidden in the pictures begins to surface. Made to mark the 50th anniversary of the Lupin III anime and the 40th of Cat's Eye, this one-episode crossover blends action, comedy and mystery with retro heist style.