A time traveler came to the world of "One Piece", obtained the "Saitama Template", and became invincible after training silently in Windmill Village for three years. Adhering to the concept of "interest driven", he joined the navy and walked on the sea as a bald and caped hero. He neither pursues power nor fame. He just wants to fight evil casually, eat discounted ingredients, and occasionally get lost... However, his existence has plunged the top brass of the Navy, the Shichibukai, the Four Emperors, and even the world government into chaos.
This is an "invincible flow" + "cold humor" daily life of the navy. The protagonist crushes everything with absolute strength, but always thinks that he is just an "ordinary navy". He had no intention of changing the world, but the world changed because of him.
