His normal days that were thought to last forever suddenly ended by the encounter with a girl with red hairs and red eyes. He named her Shana.
Not long after he had entered the high school, Sakai Yuji’s normal days finished. He saw a strange view on his way home; people were frozen in the fire, and a monster looked liked a large doll assaulted them. When he was about to be killed, a girl in a black cloth holding a large sword appeared, and cut the monster in halves. Although Yuji pulled though the crisis, the girl informed him of a hopeless fact.
`You don’t "exist" anymore'
She called herself Flame Haze who hunted “Kuze no Tomogara”, intruders from another world. She explained him that he was a "torch”, a substitute of Yuji whose “existence” had already eaten. She also told him that he was a special torch, “Mystis”, which had a precious item in it. When he looked at his chest, he saw a faint flame as she said.
In this way, his eternal fight with the girl began.
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Shakugan no Shana>