The Irregular at Magic High School: Visitor Arc

Magic users are normally prevented from studying abroad because their genetic information is treated as a national secret, but official exchange programs provide an exception. Through one such program, Angelina Kudou Shields, known as Lina, arrives from the USNA to attend First High while Miyuki Shiba's classmate Shizuku travels overseas.

Lina's arrival coincides with a disturbing series of attacks on magicians. The victims are found drained of blood, giving the unknown attacker the name "Vampire." Tatsuya and Miyuki Shiba become involved in uncovering what is behind the incidents while their new exchange student enters a school environment already unsettled by an unexplained supernatural threat.