Yuji Sakai believed his ordinary life would continue unchanged until an encounter with a red‑haired girl who caught his eye. He began calling her Shana. Shortly after he entered high school, his routine was shattered again. On his way home, he witnessed a strange scene: people were frozen in a strange fire while a massive, doll‑like monster attacked them. Just as he was about to be killed, a girl in a dark cloak wielding a huge sword appeared and sliced the monster in half. Although Yuji survived, the woman delivered a chilling revelation: “You don’t exist anymore.” She introduced herself as a Flame Haze, hunting the “Guze no Tomogara”, intruders from another world.