Shakugan no Shana

Fifteen-year-old Yuji Sakai is killed by a demonic creature, only to have his life force replaced by a fading flame. Once it burns out, all memory of his existence will vanish. That’s when he encounters Shana-a fierce warrior wielding a flaming sword, driven by the will of a god. Bound by their shared fate, Yuji joins her as an ally in the fight to maintain the fragile balance between the ordinary world and hers.