During a crustal movement on the earth, human beings' natural enemies, underground creatures, were derived. The underground creatures had brains as developed as humans. In order to compete for the dominance of the earth, they carried out a massacre of humans, resulting in a sharp decline in the number of humans. After more than a hundred years of growth, human beings have finally ceased to defend blindly and have some ability to fight back, but only to a certain extent.
Yan Xiao is a sixteen or seventeen-year-old boy. How should he survive in the face of a powerful enemy? What should he do in the face of repressed strange feelings?