The Irregular at Magic High School (Enrollment, Nine Schools Competition, and Yokohama Disturbance arcs).

Shortly after Lina's arrival, a series of "Vampire" attacks on magicians begins, involving entities later revealed as "Parasites".

Set in December 2095, the story begins with a student exchange program: goes to study in the USNA, while Angelina Kudou Shields (Lina) arrives in Japan to attend First High.