Natural phenomena, Tengu eating the sun, world changes, exchange of reality and reality. The surviving humans rely on the player systems obtained after the end of the world to start their own personal journey of survival in the end of the world. Some salted fishes turn over, leap into dragons and ride the wind and rain, some fall off the altar, dragons swim in shallow water and are tricked by shrimps. My friend, if you are also in this apocalypse, what kind of system capabilities do you want? Is it a powerful weapon and equipment? Or a weird fantasy spell?