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.