One Piece: Building the Seireitei in the World of Pirates

An accident during forging sent him to the world of One Piece, but he brought along a System that could forge Zanpakuto. What should he do? Obviously, build his own Seireitei!

P.S. The heroine is there to be sacrificed. At first, I mainly want to show how close the characters are. After that, she’ll have almost no role except for her sacrifice. I hope you can bear with it for the early chapters.