Gu Junyu, an "ordinary" scientist.
He was a "genius" scientist devoted to research, hailed as "the brightest rising star in the scientific world" before the apocalypse. But after it ended, he truly became a "mad" scientist who had lost all humanity.
Maybe there really is only a hair's breadth between genius and madness.
He dragged the entire world down with him.
When he opened his eyes, he found himself a ball of light made of energy. Or rather, this ball of light had suddenly acquired a memory, one that might or might not belong to a past life.
Theme: Why cause trouble when research is so much better?
I really like the copywriting, but it's a bummer. It's such a pity.