System Strain Book one: Tutorial

One moment Liam is getting out of the shower  and getting dressed and the next moment he is standing in grey non-descript room. Told that his world has become part of a system that pits people against monsters and that he will have to venture forth and destroy the enemies or be killed himself. He's just a fat agoraphobic shut in gamer with no friends. Can his gaming experience and years of reading manga/ manhwa help him in this cruel new world? Time will tell, but at the moment the tutorial is holding back nothing and hitting him with everything it has!