When a mysterious explosion killed an entire class full of high school students, the souls of everyone in class was transported into a fantasy world and reincarnated. While some students were reincarnated as princes or prodigies, others were not as blessed. Our heroine, who was the lowest in the class, discovered that she was reincarnated as a spider!? Now at the bottom of the food chain, she needs to adapts to the current situation with willpower in order to live! Stuck in a dangerous labyrinth filled with monsters, it's eat or be eaten! This is the story of a spider doing whatever she can in order to survive!