So I'm a Spider, So What? Novel Volume 15 was written by Okina Baba and illustrated by Tsukasa Kiryu.

After one final battle against the elves, the Demon Army emerges victorious! With Potimas defeated, the next task is to save goddess Sariel from the System, but administrator D keeps getting in the way!!! For her own amusement, she activates World Quest and pulls absolutely everyone into the game. Now what are we gonna do?!