My Childhood Friend is a Saint Who has Fallen into Darkness!

20 years ago, the "saint" Almaeira was killed on false allegations and was brought back to life as the "witch king" by the demon king. And there was another magician who crawled up from the depths of the underworld. His name is Yoal Yaotl. In order to retrieve his childhood friend who has fallen into darkness from the demon king, Yoal uses everything, regardless of good or evil.