The adventurer Darks had been bestowed great magical power and eternal life by the Demon Lord, and in return he serves as her underling. However, he was dragged into a revolt by the Demon Lord’s army and ended up becoming the new Demon Lord. He made the previous Demon Lord his wife and brought peace to the labyrinth known as the Demon Lord’s forest’… but it was soon shattered by some unknown troops who quickly took over half of the forest. After he found out through captured warriors that they were under the command of a group of three women from the heavens, he gathers his troops to launch a counterattack at the angels’ base.