"I'm a spider, so what?"

In a world where a hero and a demon king continue to clash, their spectacular magic transcends the world and explodes in a high school classroom. The students who die in that explosion are reborn in another world. The protagonist, who ranks at the very bottom of the class, is reborn as a spider monster of all things. However, with abnormally strong mental fortitude, he accepts his situation and adapts remarkably quickly. This is the story of the protagonist, who has become a spider monster, somehow managing to survive and live on. Apparently, they've released books about it too.