[Big star + royal sister + school beauty + urban beauty + sweet love + save the world + the ancestor of mankind]
"Intellectual erosion" erases high-level human intelligence, and the survivors degenerate into primitive beastiality. Cities have been reduced to jungles, civilizations are broken, and humans compete for food and territory based only on instinct.
Due to the alien alloy fragments implanted in my body, I became the only conscious human being in the world of dementia. Not only does it shoulder the important task of saving the earth, but it also shoulders the mission of breeding the "second generation of humans who are resistant to intellectual erosion"...
