The Immortal Organization That Started as Pirates

Traveling to the world of One Piece with an 'immortality system', you can create a guild, invite other strong people to join, and give others eternal life. When the plot begins in the future, when Luffy arrives at Shampoo Island and meets Rayleigh, Rayleigh reminds him with a serious face. "Luffy, when you meet someone from the 'Immortal Organization' in the future, don't provoke or make friends with them, otherwise if you accidentally anger them, it may lead to your death, and no one will be able to protect you then!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.