For eons, the Demons and Guardians have vied for control of Earth - a precious gift from the almighty Mother who created all life. The Guardians, who saved humanity from utter annihilation, have long harbored animosity towards their demonic foes. In present-day Neo-Shinjuku City, the war between the two factions has faded from the public consciousness. Yet, in the shadows of the city's underworld, a formidable Demon plots to subjugate mankind. Only one lone Guardian remains to defend humanity, and the fate of the world now hangs in the balance. This enthralling narrative draws its inspiration from the Graphic Novel "Twilight of the Dark Master (Shihaisha no Tasogare)" by Saki Okuse, published by Shinshokan.