Sudden Change Chapter is the 27th volume in the Mahouka Koukou no Rettousei Light Novel series.
The 14th Strategic-Class Magician is born! Their identity is? The greatest magic battle outbreak of war!
Tatsuya finally completes the new magic to oppose the Parasites. Around the same time, Ichijou Masaki and Kichijouji Shinkurou assault the New Soviet Union Fleet that's starting to advance south――. On the other hand, STARS start approaching Miyaki-shima Island where Lina is hiding. Finally the start of the clash begins!!