Hellfire Return: How can I be a Hero if I am a Demon Lord ?!

Ahriman the strongest Demon King (in reality a transmigrator ended in Hell by mistake) got betrayed by his army and closest generals.



Awoken in the fantasy world his classmates ended up thousands years after their passing he starts to wander this new world, fighting the remains of his past and searching a new goal in life.



Will he be able to survive this new challenge ?