Demon Lord 2099: The Lord of Immortals Blooming In the Abyss Novel Volume 4 was written by Daigo Murasaki with illustrations by Kureta.

In the futuristic Fused Era, Veltol Velsvalt can become anything - a wildly popular streamer, an exchange student at a prestigious magic school, even a prisoner with a 2099-year sentence. And his next challenge is... detective?! It's time for a whodunnit in Washington, the Endgame City, with the Demon Lord at the center!