Kumo Desu ga, Nanika?

In a parallel world, the hero and the demon king are engaged in such a violent battle that their magic was felt on Earth, even destroying a classroom full of students. However, all the people who died in this incident are reincarnated in a fantasy world, in which they will be able to find a new form. The story takes us into the everyday life of one of the victims. This person, who had the worst grades in the class, finds themselves reincarnated as a spider. Despite their unfavorable position, they accept their new life and will do everything to survive, by the sheer force of will.