One Piece? I Just Want to Protect My Sister's Dream

Traveling through the world of One Piece, Aaron once thought that he was the son of destiny and would become the king of the world. Until he was kicked out of the orphanage when he was ten years old, a girl named Reina stretched out her warm hand to him on a snowy night, pulling him back from his confusion. No One Piece, no truth about the world, can compare to my sister's words, "Let's go home." As a result, the pirates in the East China Sea faced a nightmare. "Hero" Aaron's sword is not for becoming king, but for protecting his sister's dream of becoming a world pianist. It's just that... The Dasqi who secretly became a disciple, and the maid who always wanted to repay her kindness, seemed to make his journey of guardianship more exciting...