Peter (voiced by Hiro Shimono) is a warrior belonging to the Agbachi Warrior Guild. He once won the first prize in the fighting festival and was hailed as the strongest human on the surface. Peter's biggest dream is to become the strongest man in the world and marry his childhood sweetheart Luvilia (voiced by Ninomiya Yui). Now, he is only one step away from realizing his dream. However, what Peter did not expect was that his powerful strength and rising popularity attracted women from all races to come here, and they all wanted to have a child who inherited this powerful gene. The quirky Oni sisters Lisa (voiced by Yamamura Hibiki) and Mimi (voiced by Taketatsu Ayana), the arrogant high elf Vikan (voiced by Uehara Akari), and the very introverted and always lacking self-confidence beastman Piglet (voiced by Senbongi Ayaka), these women began to compete for Peter's seed.