So I'm a Spider, So What?, Vol. 1 (manga)

I was your average, everyday high school girl, but now I've been reborn in a magical world...as a spider?! Wait-this isn't how these stories are supposed to go! Can I get a do-over? ...No? But how am I supposed to survive in this big, scary dungeon as one of the weakest monsters? It's "every spider for herself " in here! I gotta figure out the rules to this QUICK, or I'll be kissing my short second life good-bye...