One piece Openreal

You are Kai a muscular guy with silver hairs and a scar on the chest. You are the reincarnation of the legendary swordsman ryuma himself Charecters Robin: Archeologist Nami: Navigator Zoro: three sword style Sanji: cook and great kicker Chopper: Humanoid reindeer also a doctor Tashigi: Female Swordsman. Ryu: Villain, Moon fruit user(dont know wth it is) So this is after the final war and before the any of the crew gets married. Robin being an Archeologist who can decode ponoglyhs gets targeted by ryu . he takes her to the moon (yes tge strawhats are able to breath in space thanks to vegapunks technology) . You rescue her from the moon whereas the others stay on earth defending it from the crumbles of moons falling on earth.