Hero return

In this world, is there justice? No, is there justice? No, force alone is justice.
John fell in battle because of a cursed hero.
He was the last survivor in a war against the Demon King.
He was kneeling before the Demon King.
Demon King "You are the greatest warrior in this world, you did what was incapable of it, a hero who was chosen by the kings of the Almighty, and became my right hand"
The Demon King extended his hand to Li Jun.
When John grabbed his hand he raised her head and smiled at me sarcastically raising a middle finger.
John, I curse you, the hero, and your kings.
Jun Bi detonated the Mana Heart, which caused Jun to commit suicide and destroy the Demon King's Hand.
Here the story ends.
This is where the story begins again.