In a world where Crimson Denizens and Rinne lurk from a parallel realm, preying on human souls, Flame Hazes emerge to maintain harmony. Unaware of this hidden reality, Yuuji Sakai's mundane routine shatters when time halts around him, leaving him isolated amidst chaos. As a Rinne threatens to consume those immobilized, a fierce Flame Haze intervenes, wielding a fiery blade to protect Yuuji. Saved and enlightened, Yuuji discovers his new existence as a Torch, a fading remnant of the deceased hosting a mysterious essence. Marked as a Mystes with a coveted treasure, Yuuji becomes a target for the Denizens. Embracing his borrowed time, he accepts his inevitable fate and vows to cherish each fleeting moment under the vigilant eye of his fiery guardian.