In a world where ordinary humans are merely "Torches"—temporary stand-ins fated to vanish from memory once their life energy is consumed—high schooler Yuji Sakai discovers he possesses a rare, highly potent Torch containing a "Midnight Lost Child," a mysterious treasure that replenishes his existence every night. His mundane reality shatters when he is attacked by Denizens, otherworldly beings harvesting human energy to reshape reality. He is saved by a fierce, red-haired Flame Haze—a warrior bound to balance the cosmic order—whom Yuji dubs "Shana." Initially viewing Yuji as a mere object, Shana is stunned to find his Torch is sentient. Bound by circumstance, they form an
uneasy alliance, with Shana protecting Yuji while living in his apartment, slowly earning the human name "Shana." As they navigate high school life, they confront various Denizens, including the manipulative Friagne and the seductive Margery Daw, another Flame Haze with a tragic past. Yuji gradually discovers his latent, immense power and resolves to fight alongside Shana rather than remain a passive victim, driven by his desire to protect the innocent and forge his own destiny. The fragile peace shatters with the arrival of Bal Masqué, a powerful organization of Denizens led by the charismatic yet ruthless general, Sydonay, and the mastermind, Hecate. They seek the Midnight Lost Child hidden within Yuji to execute a grand ritual that will disrupt the universal balance. During the climactic battle against Bal Masqué’s forces, Yuji learns the terrifying truth about his origins: he is actually the reincarnation of the Snake of the Festival, the supreme deity of the Denizens, and the Midnight Lost Child was placed inside him to nurture this dormant god. Manipulated by his own hidden nature, Yuji experiences a profound
identity crisis as his memories and humanity begin to slip away. Despite Shana’s desperate attempts to reach the boy she has fallen in love with, Yuji ultimately chooses to side with Bal Masqué, believing it is the only way to create a world where Flame Haze and Denizens can coexist without endless bloodshed. Heartbroken yet resolute, Shana refuses to give up on him. She gathers her allies for a final, apocalyptic confrontation against the newly awakened god. In the ultimate showdown of wills and power, Shana reaches Yuji’s true consciousness, sparking a reconciliation that transcends their warring factions. Together, they rewrite the rules of existence, sealing the god’s ambition and carving out a new, peaceful realm where humans, Flame Haze, and Denizens can finally coexist, allowing Shana and Yuji to embark on a shared future together.