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Yoshino, who, up until a few days prior, had been a legitimate Ordinary High-School Student, winds up taking matters involving the Tree of Beginnings and the Tree of Zetsuen into his own hands, throwing himself into a life-or-death battle for the sake of Hakaze. Or, more specifically, the sake of preventing another girl from dying in this conflict, and comes out on top against his borderline Axe Crazy best friend and a seasoned mage who also only wants what's best for the world.
Hanemura calling Mahiro out on having a sister complex.
Hakaze VS Fuwa Aika, the Mage of Exodus. And Aika totally schools her to boot.