Demon sovereigns of terror and abyss that mercilessly slays their enemies. With overwhelming power and teamwork, Lu & Ciel annihilates all forces in a blink of an eye. Lu & Ciel’s demonic powers become stronger by accepting the power given by the Demon God of Terror.

"Together, we can become stronger!"

After fighting against stronger enemies, Ciel finally persuades Lu to leave his human side behind to be reborn as a full-fledged demon.

Now, they are no longer tied by contract, but exist as equal beings, as the Demon Rulers of the Abyss.