Blackmailing A God. Cheating In Another World

Blackmailing A God. Cheating In Another World,

The MC was 25 years old man who is a type of otaku who can consume everything from military to magic occult. One day he got to an accident that cost him his life. It turns out, a god from other world are the perpetrator. The god told the MC that he want MC to help his world from an impending dissaster few years ahead.