Pirates of the Great Sea Wind God

What happens when a college student with little knowledge of One Piece arrives in the world of One Piece? And by a twist of fate, he becomes Nami's older brother, turning into a sister-complex. Anyone who dares to covet Nami can just die! What are you looking at, it's you, Momonosuke! This is the story of a marine! A person who controls the most important element for sailing on the sea - the story of the wind. The introduction is a bit weak! Come and take a look!