Star Cat Squad in the World of One Piece

by 处女座仙女

Due to an accident, Star Cat and Ou Yingwan, leading the Cosmo Guard Team composed of twelve zodiac warriors, unintentionally travel to the world of One Piece. They meet Luffy, and to return to their original world, they must find the Great Treasure, with Luffy being their only hope. — Description from novelcodex.org