Reika, known as Jin-Rei, is an elite angel of the Fallen Seraphim, a clandestine unit meant to eliminate corrupted beings — demon or angel. But after his partner Hanari Kuon (Sung-Kuro,) is slaughtered in a setup orchestrated by the very angels they served, Hanari begins to question everything. In a city devoured by unseen wars, Kuon discovers a black scripture: The TENMA Protocol, a hidden doctrine revealing the true origins of angels and demons — not divine, but born of human emotion and ancient trauma. The real enemy? Crius, the Archangel of Order, who secretly controls both sides — orchestrating angelic executions to purge “impure” souls and prepare for a divine reset.