Musician in the World of Pirates

The protagonist traveled through time and became a ten-year-old aristocratic young man. He has been a musical genius since he was a child and has the ability to copy everything. No matter what tune he listens to once, he can copy it like a printer. "You said I molested her? I'm just a ten-year-old child." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.