So far it's been quite entertaining, following the patterns of stories about false and evil heroes with a protagonist who returns and decides to hinder their evil goals.

I dont know how to put spoiler tag to hide the text below

The difference is the ability shown at the beginning to see sins, it seems that it is made to counter the power of the Demon King, his epithet involves secrets and the protagonist making judgments of criminals may be a plot tool to weaken the final boss.