Karna was a boy that was given the title of "Sage" from heaven, is scouted by the hero party that had great expectations for his skills.However, his skill "necromancer" was creepy and he was immediately exiled.Karna, who got lost on the road without getting a reward, had accidentally invaded the Demon King territory and was targeted by the demons!Karna faced a demon with a mighty power, but defeats it with magic that overwhemed it by far.A fearsome demon. Meanwhile, Cecilia the devil, who saw the whole scene, offers Karna a large annual salary.And Karna decided to become an enemy of humanity as a magician with the Demon King army――.

Called a failure by his adoptive parents, bullied at school, ignored by teachers, high school boy Kurogane Rikuto has nowhere to belong neither at home nor at school."Life is sh**. I guess I'll die." After saying this, he was about to commit suicide by jumping off the school's roof when suddenly all sorts of monsters started appearing from students' smartphones, transforming the school into a hellscape of screaming agony.Goblins, orcs, slimes Everybody has seen them in games: "small fry monsters". However, humans in the real world, where there is no magic, no special abilities, and no leveling up, are devoured by those "small fries" without any means to retaliate.Rikuto, spared from the incident due to his bullies destroying his phone, seeing the students who bullied him and the teachers dying unsightly deaths and the collapse of order, realizes he does have a desire to survive.Just then, a goblin wielding a club attacks him from behindThus begins the survival action tale of one insignificant human driven into extreme circumstances.