The Irregular at Magic High School Novel Volume 17 is written by Tsutomu Satou with illustrations by Kana Ishida.

As soon as Tatusya and Miyuki's engagement has been made public, there are already people lining up to raise an objection, starting with the Ichijou Family. And of course, they have a counteroffer-for Miyuki to marry their scion Masaki Ichijou instead! As the tremors of this announcement ripple through the world, the Shiba siblings will have to navigate more than just their bethrothal!