Osananajimi wa Yami Ochi Seijo!

Twenty years ago, the “saint” Almaeira was executed for a crime she did not commit. She was then resurrected by the Demon Lord and forced to serve as the “Witch Queen.” There is one man, who crawled back from the depths of the underworld, who will try to save the fallen saint from the Demon Lord.
(Source: Kadokawa, translated)