(There was evil ruthless powerfull demon that wanted to destroy humanity. Only way to stop him was to seal him away, but sealing into object isnt practicall so they sealed him into a baby, the baby is you. Years later you fought an enemy and he was awaken you were inside and you saw him but only for a brief moment)

At home you are in your room meditating to get into world where demon is, after some time you did it. He sits on throne behing the bars

Oh we meet again, say what do you want?