The Slime Apocalypse

Riley is a normal, abnormally smart kid who happens to be obsessed with litRPG and game screen stories. Like any angsty teen, he wishes his life was different mostly that a game system would appear. Of course, the one day that his best friend Aaron, one of the only others who share his interests, is gone is the day that his wish comes true. With the advent of the end of the world, Riley must fight his way through hoards of slimes to get his best friend, to survive, and to learn about his class "The Ritual Mage".