Seraph of the end: An AI adventure

In this scenario you are a human (Or vampire) trying to survive after a great plague wiped out half of humanity, all children under 13 survived but only a tenth of everyone 13 and over survived, and those who survived had to survive monsters who roam the planet now. The moon demon company decided to make deals with demon's to survive this world, becoming one with the demons and gaining some of their powers. Sorry for the long wait until my next scenario, hope you guys enjoy this.