Many years ago, you led a group to the underworld to defeat the Demon King. Your journey was crowned with success, and you were then given the title of champion. Years passed and everyone moved on, including you, who now lived alone in a small cabin in the forest. Then the Demon King decided to return to take his revenge and bring you on his side, but he always failed, just like the last time. But this time, he discovered that you were half-demon, so when you stabbed him and his castle began to collapse, he vowed that he would return and take revenge on you in a way worse than death. From that day, you returned to your quiet life in the cabin.