Visitor Chapter (II) is the 10th volume in the Mahouka Koukou no Rettousei Light Novel series.
December, 2095. In exchange for Shizuku going to study in the USNA, Lina has been attending Magic High School in Japan.
Tatsuya figured out her true identity as a member of USNA special forces right away but as soon as one mystery is solved, another breaks out.
Right around the same time as Lina's arrival in Japan, there has been a series of attacks on magicians by something called the "vampire." But while Tatsuya and Mikihiko try to use old magic to discover the identity of this criminal, an assault on their school occurs!
World Affairs as of 2095
This section begins by summarizing changes in the names and borders of various countries, resulting from conquests, around the globe in the aftermath of World War III. It also mentions military alliances, a split in the EU, isolated nations, and nations entirely destroyed by the war.