One Piece Special: Protect! The Last Great Stage (ワンピース 守れ！最後の大舞台) 20 years old

Aired after Episode 174 - It is the last performance of a great actor and playwright, but several actors suddenly quit. Luckily, the Straw Hats offer to take their place. However, the quitting actors turns out to be more than a coincidence when they meet a Marine with a grudge against the playwright.