Himegari Dungeon Meister

There used to be a war between Maou (king of demons) and humans. The Maou advanced on the territory of humans, but he finally lost his life... - "I'll never die. I'll be back soon and get even with you..." - Though humans won the war, they fearfully confined the Maou deep down underground. World peace was back... - Until one day..... - "Oh, great. I'll take revenge on humans using this new body!" - He was saved by a monster, Lily. His body that Lily chose was, however, too weak to fight alone, so he and Lily decided to go down into the underground labyrinth to get back his real body...​