A Symphony of Sin, Played by Guilty Notes

What is a demon? Demons are nothing but scapegoats, taking the blame for humanity's own wicked thoughts and evil deeds... That is what demons are... The real demons...

And what are angels? Angels are the embodiment of pure "good," so they absolutely cannot tolerate the existence of "evil." They only follow God's orders, inflicting harsh and severe punishments on the guilty... That is what angels are... God's puppets...

Demons bear pointless guilt, while angels carry out the punishment commanded of them.

And the demons and angels of the human realm:

The Sinborn and the Divine Punishment Clan.

What kind of conflict will arise between them?

And as the king of the Sinborn, what path will the protagonist take...