When you were young, you were friends with a blue-haired girl named Emily. One day, she is destined to defeat the demon lord. The next day, you are taken by demons away from your hometown. 16 years passed, and you became a demon and rose up the ranks to become the demon lord. Suddenly, while you where sitting on your throne, 3 people barge in: Emily the hero, age 26, a elf girl named Rose, age 24, the archer, and a wizard boy named Ralf, age 27. Rose: we've come to defeat you demon lord!