Peter Grill and the Philosopher's Time manga volume 4 features story and art by Daisuke Hiyama.

Goblins attack! Female goblins in search of high-quality human seed are storming villages all across the land. The Warrior Guild mobilizes quickly, but not before Luvellia ends up in trouble. Peter Grill, Strongest Man on Earth, must fight to save his betrothed! But will his fight with these elite goblin warrior women end in a totally different kind of takedown?