Post-Apocalypse: Perfect Genes

The ruins after the nuclear war, the ubiquitous nuclear radiation, deadly diseases, unpredictable mutations, ferocious and powerful mutated creatures, living corpses, and ability domainers who have acquired various abilities through genetic mutations; fraud, robbery, rape, war, death...all of these constitute the main theme of this era.
This is an era where humanity is rare and beastly behaviors are rampant.
This is an era that looks like hell to most people, but a paradise for a small minority.
It is the worst of times, and it is also the best of times, an era in which genes and abilities determine everything.