The continent was home to both humans and elves, living in harmony. Sadly, a curse from the Demon King brought about an end to the birth of female offspring among humans. In an effort to save the human race, the elves imposed a new decree allowing humans to reproduce despite the curse. This decree involved empowering men by providing them with eggs or "balls," which could transform them into women once removed, thwarting the Demon King's plan to wipe out the human race with his curse.