In Oroka na Tenshi wa Akuma to Odoru, the demons of Hell are losing their war against Heaven's angel army and stand on the brink of collapse. In a last-ditch attempt to save their homeland and turn the conflict around, they send Akutsu Masatora to Earth on a recruitment mission. Posing as an ordinary high school student, he searches for someone with the charisma and power to unite demonkind and lead them to victory. Among his classmates, the beautiful transfer student Lily Amane immediately seems like the perfect candidate.
Akutsu's plan falls apart almost as soon as it begins. Lily is not a gifted human ally but one of the very angels he was sent to oppose, and their encounter turns a desperate military mission into a volatile mix of rivalry, deception, and attraction. As the battle between Hell and Heaven spills into everyday school life, Akutsu finds himself drawn to the worst possible person for a demon to trust. Adapted from Sawayoshi Azuma's manga, the series blends its celestial conflict with romantic comedy as Akutsu risks making the biggest blunder of the failing war: falling for his own worst enemy.