Reincarnated for Calamity

Arata Shouhei, was a highschool student was killed was killed in a gun fight during a terrorist attack along with five others. Surprisingly, instead of the darkness or afterlife they are greeted by god requesting them to aid another planet from danger. However, Arata decides to turn down the request, wishing for a normal life on Earth. The god agrees but soon after being sent away he finds himself in an unknown place which was definitely not Earth...