An otaku in the 21st century travels to One Piece with the exchange system and the true demon god. Is he an esper? I have a Devil Fruit that won't lose my powers even if I touch the ocean, can you do that? ! The world's best swordsman? I have the Six Forms of God, who do you think you are? ! You mean Wulaoxing? Errand boy, you mean Yonko? That's the tea server. You mean Admiral Admiral? That's for cleaning. Now that you have strength, will you still have gay friends? Will there still be no harem? The protagonist is not invincible right from the start, he also needs to grow.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.