WebNovel で公開されている、Gregory_Gron の作者が書いた The Demonic Champion: Book 1: A Progression Portal Fantasy Series の小説を読んでください。You slaughtered hordes of demons and defeated their generals. Their leader was cast into the lava by your hand. However, after that, you found yourself in another world where you were weakened and cut...
You slaughtered hordes of demons and defeated their generals. Their leader was cast into the lava by your hand. However, after that, you found yourself in another world where you were weakened and cut off from the local power, Prana. Here, they mockingly dubbed you 'the school's champion Imp'. But why not embrace that moniker? Ascend to the status of a true champion known as the Devil.