Help Me Find a Novel's Title, I Can't Find This Book Anymore 求书名，找不到这本书了

The protagonist first transmigrates to just before the Fourth Great Ninja War in Naruto, where he discovers he can open spatial portals to parallel worlds. He visits several Naruto alternate universes, then eventually connects to a parallel world of One Piece. In that world, Luffy becomes a Marine, and the protagonist takes Marine Luffy to the original One Piece world, where they save Ace at Marineford.