I’m in One Piece, Building the Strongest Kingdom!

Invincible flow, super cool writing. Saje traveled through the world of pirates and became the emperor of a country. Awaken the most powerful kingdom system and summon characters from all over the world! So, after several years of development. A small country that could not even pay gold from the sky has become a super country that attracts the attention of the world! Germa 66: "What the hell is Shura Armor? It actually destroyed my fleet with one sword!" Vegapunk: "That scientist named Big Big Wolf can even mass-produce Devil Fruit without any side effects!" Hawkeye Mihawk: "I actually lost to a Tom Cat with a Western sword? How can this be justified!" Five Old Stars: "Where did the Kingdom of Red Dragon come from? It dares to ask us for heavenly gold. It is a rebellion against Tiangang!" Navy: "The Red Dragon Kingdom's productivity, education, national defense, and people's livelihood... Are also far ahead! Not only did they stand and make money, they also implemented true justice!" The Four Emperors: "What kind of emperor of the sea? We no longer deserve it! I just ask Lord Sajie to have mercy and let those terrible monsters go back!" The eyes of the kingdoms all over the world fell on the Kingdom of Red Dragon, and they all knelt down and asked for asylum! Sajie leaned back and said: "Why do all nations come to court? Let all nations be unified!"