(No system, not invincible, not brainless, unhappy writing, plot flow, slow pace)
Demons in this world are real
Among them are the more powerful Seventy-Two Demon Gods
Above the demons, there is also the demon king who rules hell.
But suddenly a group of people appeared in a world where demons were rampant
They signed a soul contract with the devil
Trade your life for the power to kill demons
Walking alone in the world
Keep killing demons, killing demons
then die alone
Until he appeared
Only then did people see the legendary beautiful and holy angel
But no one knows
The devil of hell is a fallen angel
