Is Lupin III: Twilight Gemini no Himitsu hentai?

TV Special · 1996 · 1 episodes · R+ - Mild Nudity

Action, Adult Cast, Adventure, Comedy, Shounen

A dying mob boss entrusts Lupin with a diamond that supposedly is the key to a vast treasure. But when Lupin is attacked by an assassin and saves a mysterious girl from trouble, it becomes clear that that there's more to this treasure then meets the eye... (Source: ANN)