Young girl Yukari appears in Nagisa's school, Seiun Academy, trying to become strong enough to reclaim her family's dojo. Nagisa volunteers to teach her, and Yukari develops feelings for Nagisa.
A new music teacher, Okuno Hosomichi, appears at Seiun Academy. It's love at first sight when he sees Nagisa, believing her to be a boy. Nagisa doesn't return his feelings, but he refuses to back down..
Seiun Academy is airlifted next to to Shirayuki Middle. The schools collapse into the ground, and St. Juliana Academy, headed by Gold Shibibura, emerges from the rubble.
