One Piece: I Can Summon the Strongest from All Realms

Chen Yuan traveled to the world of pirates and obtained a system that can summon powerful men from all realms! From then on, there is another power in the sea that can change the world! Uchiha Madara: "Do you want to dance too?" Boros: "I've been looking for someone to fight with!" Gilgamesh: "The king will admit it, the king will allow it, the king will bear the whole world on his back!" Marquis Woban, Elder Centipede, Kenpachi Zaraki, Kusuo Saiki... Warring States: "There are more and more variables on the sea, but fortunately, we have the strongest navy, Saitama!"