Shakugan no Shana is a tV series anime that premiered in fall 2005, produced by J.C.STAFF.

About the production: the story comes from a light novel, there are 24 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, comedy, drama, fantasy, romance and supernatural, with themes such as Super Power, Urban Fantasy, Tsundere and Love Triangle.

On AniList, Shakugan no Shana has an average score of 70%, a good score, and appears on 97,839 users' lists.

The franchise continues in or follows from: Shakugan no Shana II (Second).

He had thought his normal days would last forever, until they were ended abruptly by an encounter with a girl with red hair and eyes. He named her Shana. Not long after he enters high school, Sakai Yuji’s normal days come to an end. He sees something bizarre on his way home: people are frozen in a strange fire, and a monster that looks like a large doll is attacking them. Just when he's about to be killed, a girl in a dark cloak wielding a large sword appears, and slices the monster in half. Although Yuji survives the strange encounter, the girl informs him of a desolate truth: " 'You' don't exist anymore." She calls herself a Flame Haze who hunts "Guze no Tomogara"; intruders from another world. She explains to him that he is a "Torch", a substitute of Yuji whose “existence” has already been devoured. She also told him that he is a special Torch, "Mystes", which contains a precious item in it. When he looks at his chest, he sees within himself a faint flame, just as she said. It is in this way that his eternal struggle alongside the girl begins. (Source: AnimeNfo)

Official synopsis from AniList.