At the beginning of the new semester, high school student Yuuji Sakai lived his "daily life" as usual. However, one day, he was attacked by the men of the Red King. He was attacked by Fariagni, a mysterious man who could turn people's existence into spiritual fire and absorb the spiritual fire. Yuuji's "daily" life was completely disconnected, but at the same time, a girl appeared in front of him. In order to protect Yuuji from Fariagni's attack, the girl began to live with Yuuji. Yuuji thanked the girl with gratitude, but unexpectedly, the girl murmured: "You no longer exist." I'm dead? Why can Yuuji, who has lost his existence, still think...