Double-Crossing the Start, Mixing Among System Owners

You say I am the son of destiny, why do they all have systems but I don't? Oh, it turns out that the world is about to end, and all kinds of monsters and monsters are appearing. The world is riddled with holes and is heading towards destruction. Sober struggle, blind joy, everything, where will they go when the final judgment comes? When the dust settles, perhaps all that will be left is hope? How do people whose fates are intertwined pull and struggle in this desperate quagmire...