Ein neues Mädchen kommt an die Schule und macht sich gleich an Shidou ran – womit Touka und Origami gar nicht einverstanden sind
Außerdem bekommt das A.G.T. Verstärkung, und Shidou bekommt eine weitere kleine Schwester
Mana is having a 10v1 practice match against Origami's unit before having introduced herself at the briefing AST's previous battle with Hermit where she unknowingly reveal's herself to be Shido's sister. Kurumi transfers into Shido's class revealing herself to be a Spirit to get closer with Shido. During her time touring the school with Shido they're followed by Origami and Tohka, but as Shido is attempting to seduce Kurumi she is also attempting to do the same to Shido. After school, Kurumi kills three humans and is confronted by Mana. Mana then runs into Shido later on that day. Taking her to his house, what Mana shares about herself leads to a quarrel between her and Kotori but ultimately leaves everyone with more questions than answers.
「わたくし、精霊ですのよ」転校生・時崎狂三は、こともなげにそう語った。
時を同じくして、AST天宮駐屯地では陸上自衛隊のトップエース・崇宮真那が配属となる。
新たな精霊の登場と、士道を"にーさま"と呼ぶ真那に、士道や琴里は混乱必至！？
토오카에 이어 또다시 전학 온 여학생, 토키사키 쿠루미.
자기를 정령이라고 말하는 그 여학생은 왠지 모를 야릇한 분위기를 풍기고 있었다.
한편 저녁 장을 보고 돌아오는 길에 시도는 자기를 오라버니라 부르는 한 여자애를 만나는데...
Mana está teniendo un combate de práctica 10v1 contra la unidad de Origami antes de haberse presentado en la batalla previa de AST con el Ermitaño, donde sin saberlo se revela como la hermana de Shido. Kurumi se transfiere a la clase de Shido y se revela como una Espíritu para acercarse a Shido.
All'AST viene assegnata una nuova ragazza, che si dice sia riuscita ad uccidere uno spirito. A scuola si trasferisce Kurumi, una ragazza che dice di essere uno spirito e che è interessata a Shido.
