ruined, but is it?

in 2045 a glorious meteor shower happened, unfortunately they landed to earth carrying aliens that did unspeakable things to humans so they can make our world there's. for one individual rain, he lived through the impossible, hold up in his families condo/apartment to figure things out in the course of 6 years in the after math of this, to learn the ways of these aliens so he can continue to survive. unfortunately food started to become scarce, he has to venture further and further away from his home where he meets......
to find out, you need to read.