The Otaku in the Apocalypse Can't Live with It

I, Shen Yuan, a handsome and smart young man, was stabbed in the back by my grandfather and developed severe depression + social phobia. When my parents saw that the tuba was useless, they sent me to a mental hospital, and they reopened the trumpet. Finally, with the intervention of a psychiatrist, he took a two-year break from school and reappeared in front of others. He originally wanted to be a quiet and invisible man, but he didn't expect that he was faced with the bad news that mankind was about to usher in the end of the world. If the sky falls, a tall man will hold it up! I can still survive, right?