I always have this thought ever since the Demon king was introduced. What if all the heroes now and the past lives, never defeated the Demon King. Instead, he let them return in order to meet Jun once again by taking their bodies over or cursing, etc. But these heroes did not let themselves succumbed so, they never returned to her. Wew, Graham is the sole hero that chose to go back no matter the odds. But I can see that he's not winning here.