Gu Jie, a magician who orchestrated a sinister suicide bombing by manipulating corpses to do his bidding, has gone into hiding somewhere in Japan. As public outcry against magicians builds and humanist forces gain momentum, the Ten Master Clans task Tatsuya, Katsuto, Mayumi, and Masaki with determining the whereabouts of the mastermind behind the bombings. But when Major Benjamin Canopus, the second-in-command of the most powerful magic unit in the United States, starts gunning for Gu Jie as well, Tatsuya becomes inexplicably enraged!

At the same that the leader of the USNA's elite magician unit, the Stars, traveled to Japan under the identity of an exchange student named Lina, the parasite incident wreaked havoc on the First Magic High School until Tatsuya and his friends saved the day and brought the incident to a peaceful conclusion. However, the parasite merely lost its first host and continues to wander this world. More importantly, it's found its next host-a humanoid helper robot. After copying Honoka Mitsui's behavior and patterns, the parasite has been reborn as Pixie, vowing to follow and serve Tatsuya. After learning more about parasites from Pixie, Tatsuya gathers Miyuki and the others to head towards the Aoyama Cemetery to fight against a new impending danger!

April 2096 has arrived. Despite the commotion they were involved in, Tatsuya and Miyuki safely passed all of their classes and are now returning as juniors for another semester. In light of Tatsuya’s accomplishments, a magic engineering curriculum has been established, granting him a new lease on proper student life. With his new classes and his position as acting student council vice president, Tatsuya is certain that this year for sure, he’ll be able to enjoy a peaceful time at school with his sister...until three freshmen form the elite Numbered families start raising hell in their First High debut!

Looking at Miyuki and Tatsuya now, it might be hard to imagine them as anything other than loving siblings. But it wasn't always this way... Three years ago, Miyuki was always uncomfortable around her older brother. The rest of their family treated him no better than a lowly servant, even though he was the perfect Guardian, watching over Miyuki while she lived a normal middle school life. But what really bothered her was that he never showed any emotions or thoughts of his own. However, when danger comes calling during a fateful trip to Okinawa, their relationship as brother and sister will change forever...

The invitation has arrived. It is time for the New Year’s Reception at the Yotsuba family residence. This year, Miyuki and other candidates will gather there to decide who will be the next leader of their powerful clan. If chosen as the successor, she would never have to see her brother live as a pariah ever again. At the same time, such a position surely entails a political marriage, plunging her mind into complete turmoil. Complicating matters, the current head of their family sows doubt with the shocking claim that Miyuki is not Tatsuya’s sister. When the new year comes, their relationship may be changed forever...

Two months have passed since the nefarious events surrounding the latest Nine School Competition, and its cerebral counterpart, the Thesis Competition, is fast approaching. Helping out First High with the event, Tatsuya will surely have his work cut out for him even if everything goes according to plan. Of course, nothing ever does, which might explain the letter from Maya Yotsuba containing a curious request: to assist in the capture of Gongjin Zhou, one of the masterminds behind the recent Parasidoll incident. Tatsuya and Miyuki depart for Kyoto, where they’ll have to keep their wits about them to safely navigate the hidden schemes and shadowy conflicts that lurk just beneath the surface of the ancient capital!

A suicide bombing brings the Master Clans Council to an abrupt close! Armed with only the knowledge that the explosion was triggered by corpse manipulation magic, Tatsuya sets off in search of the perpetrator along with Juumonji. After being egged on by his father, Masaki trails behind them to Tokyo in an attempt to one-up Tatsuya’s investigation. But things take a turn for the unexpected when Masaki summons up the courage to propose to Miyuki…

Spring is here, and the graduating seniors of First High are planning a getaway to sunny Okinawa. At the same time, Tatsuya and Miyuki will be on the island as the Yotsuba family’s representatives at a memorial service for the victims of the invasion there several years earlier. Of course, this is just a cover for their true purpose: foiling a terrorist plot hatched by some deserters and Australian operatives. Their primary target is a party that Shizuku and Honoka will be attending—What are the chances? Romance is in the air, and danger is on the horizon, making this a vacation they’ll never forget!

The Ten Master Clans and the Eighteen Support Clans have gathered for a conference to raise concerns about Tatsuya's behavior. His official position is that all his actions were necessary to protect Miyuki and he has the full support of the Yotsuba, including the current head of the clan, Maya. Naturally, some of the other families are not so easily convinced. And while this captures everyone’s attention, Mitsuya Shiina vanishes without a trace, kicking off yet another incident that may affect more than just First High...

March 2097—Brazil deploys the strategic-class spell Synchroliner Fusion in South America, starting a wave of unrest that will reach as far as Japan, where the new school year is just beginning. Tatsuya and Miyuki have entered their third year at First High, but anti-magician sentiment has been steadily rising. As many young scions of the twenty-eight families gather to discuss what to do about the concerning political climate, a much more immediate threat sits just beyond the shores of Sado Island...