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... "Ill never die. Ill 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. Ill 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...