Sai's you average introvert living in a year not far from our own. He goes to the comic shop every Wednesday. He rarely likes to hang out with strangers. He doesn't enjoy alcohol(does anyone actually enjoy alcohol though?) and he's a fairly skilled programmer. The only problem is he got a bullet to the face one fine night. Now he wakes up to the city getting invaded by hell, aliens, and every so often other humans. There are random psychopaths who can fly, shoot webs, and blast magic. And he's now working at a random coffee shop frequented by villains. Just a normal Monday.