Class Master's Fictional World

Earth's Will offered a isekai deal to over 100 billion humans in exchange of becoming a catalyst for the planet's transformation into a new supernatural world. Only three survive this process but their soul and body has already eroded to only conscient remnant wills, ghosts of their former selves. 500 hundred years passed, one of the three survivors---Joster being embarking on the path of cultivation to to turn his fantasy into a reality. Read how such a being starts adventures in a new world striving for Power, Wealth, Lust. (Spoiler: The other two beings entered Nurarihiyan No Magu World and Demon Slayer World)