Akuma mo Fumu o Osoreru Tokoro

Every 666 years in the Demon World, a fight to decide the next King the "Demon King Festival" is held. It is a battle royal fought with demons paired with human sorcerers. The demon Aini, carrying the desire to be King in her heart, quickly responds to her summoning in the human world, but what awaited her was… A battle comedy with humans and demons begins!!