Starts with a flash forward to the Nine Schools Competition where Miyuki uses high ranked magic. It then goes to the first day of school where Miyuki and Tatsuya are arguing over his examination results. It then showcases the discrimination in the Magic Education system. While waiting for Miyuki's speech as freshmen representative, he bumps into Mayumi.
The Siblings' House
The Numbered Family System is explained. Mayumi is impressed by Tatsuya's entrance exams scores which are a record high. In the auditorium he meets Mizuki and Erika. Miyuki's address, despite the controversial wording, is well received. Mizuki's eyes cause Tatsuya concern over whether or not she'd be able to see his secrets. Miyuki is jealous over Tatsuya being with girls, but warms up to Erika and Mizuki. At home, Miyuki is his maid.
Tatsuya and Miyuki leave for Tatsuya's Close Quarters Combat Practice at a Shinobi Temple. Kokonoe Yakumo is a shinobi and Tatsuya's master. Yakumo is a master of Ninjutsu a type of Ancient Magic. Tatsuya explains how Modern Magic works when Miyuki uses Magic to clean herself and Tatsuya after practice. When traveling to school Miyuki tells Tatsuya that their father called her to congratulate on entering First High School. She become upset because Tatsuya was not congratulated. Miyuki's magic goes out of control and Tatsuya helps her suppress the magic. Their father is unhappy because Tatsuya refused to help him at the company and instead entered First High. Their father considers Tatsuya only as a tool to be used for company profit. At school Saijou Leonhard introduces himself to Tatsuya. Ono Haruka introduces herself to Tatsuya's class as the coordinating counselor for First High. At lunchtime Course 1 students make a fuss when Miyuki wants to sit with Course 2 students, Tatsuya and his classmates. After-school a tense stand-off occur with some Course 2 students aka Weeds specifically Tatsuya, Erika, Mizuki and Leo on one side and some Class 1-A students Course 1 students aka Blooms on the other side.
Student Council members Ichihara Suzune and Nakajou Azusa are introduced to the Shiba siblings by President Mayumi. Vice-President Hattori who is absent is mentioned by Suzune. The general functions and the composition of the Student Council and the Public Morals Committee is explained. Miyuki is invited to join the Student Council. Miyuki requests that Tatsuya be invited as well however Tatsuya cannot join the Student Council due to school regulations prohibiting Course 2 students joining the Student Council. Watanabe Mari suggests that Tatsuya join the Public Morals Committee and despite Tatsuya's objections he is assigned to The Public Morals Committee by Mayumi. After-school the Shiba siblings go to the Student Council Room with Tatsuya intending to refuse his assignment to the Public Morals Committee. They meet Hattori inside the Student Council Room.
Provocation X Provocation
Hattori ignores Tatsuya and introduces himself to Miyuki. He also expresses disapproval of Tatsuya joining the Public Morals Committee because he thinks a Weed will not be able to manage the Blooms. Miyuki interjects by declaring Tatsuya will not lose to anyone in a real battle. Hattori criticizes Miyuki for her outburst. This forces Tatsuya to challenge Hattori to a mock battle to prove Miyuki right. Hattori is one of the top 5 strongest Magicians in First High and has never lost a match in high school however Tatsuya instantly defeats Hattori when the match begins.
The details behind Tatsuya's overwhelming victory is explained and everyone in the arena discover that Tatsuya's CAD, Silver Horn is equipped with Loop Cast. It is a technology developed by the mysterious CAD Engineer Taurus Silver. After the match Tatsuya formally joins the Public Morals Committee.
CADs are explained and it is revealed that the Shibas, for some reason, have a fully functional CAD lab built in their basement. Miyuki asks for Tatsuya to tune her CAD and strips to do so. Miyuki gets jealous over his interaction with his senpais and attacks Tatsuya, knocking him out. Self-Regrowth is revealed here. Later, Miyuki reveals that she has romantic feelings towards her brother but it cannot be due to their blood ties. It is revealed that their family looks down on and imprisons Tatsuya, but she wants to save him. Later, Erika and Tatsuya agree to look at clubs together.
In the Public Morals Committee room, Morisaki demands to know why Tatsuya is there but is stopped by Mari. They are all on duty for the clubs' enrollment week which will be hectic, as everyone is enthusiastic to get the best members for the Nine Schools Competition later on. Mari explains what Morisaki and he need to do on patrol and allows Tatsuya to take two CADs from the room. Morisaki acts belligerent again. Tatsuya meets Erika late outside where they run into possible trouble.
Trouble: The Beginning
Tatsuya intervenes when Erika gets in trouble and helps her escape, although gets embarrassed when he accidentally sees Erika's bra. She kicks him and her eyes water in pain, but he doesn't feel it. They view the Kendo club's practice, which is interrupted by trouble caused by a member of the Kenjutsu club; Kirihara Takeaki. After Sayaka wins, Kirihara invokes a dangerous spell that turns his wooden blade into a real sword.
Trouble: The Beginning 2
Tatsuya intercedes before Kirihara hurts Sayaka and somehow stops his magic and pushes him down before anyone can react. Tatsuya accidentally irritates the Kenjutsu club by being patronizing and they attack him. Despite attacking en masse, Tatsuya defeats the Kenjutsu club without touching them. The Kendo club's head, Tsukasa, become interested in Tatsuya's magic cancelling ability. Later on, Tatsuya explains the situation before Student Council President Mayumi, Public Morals Chief Mari and Clubs Management Chairman Juumonji Katsuto. They agree to drop the matter, but Katsuto becomes interested in Tatsuya. Afterwards, Tatsuya meets up with Mizuki, Miyuki, Leo and Erika where he has a too intimate moment with Miyuki before they head to a cafe. They discuss the incident where Miyuki explains that Tatsuya used Cast Jamming to stop the attacks.
Tatsuya and Miyuki have another far too intimate moment, embarrassing Leo and Erika, but sending Mizuki into a fan-girl moment. Tatsuya then explains Cast Jamming and the 8 Types of Magic and the 3 exceptions. Usually, Cast Jamming only works with the military heavily restricted resource Antinite, but Tatsuya has created his own mock Cast Jamming spell, which is insanely difficult. He explains why he doesn't make this knowledge public. The next day, the 1st Course students seem to be intentionally attacking him. He is attacked by a mysterious person who then runs off. Tatsuya has become famous, occurring to his friends, causing a stir in the school as to how a 2nd Course could take on 1st Course students and win. Sayaka asks him to talk with her in the cafeteria. Miyuki worries about how when Tatsuya's true power is discovered, people will flock to him out of selfishness. He thinks that it will be fine if his secret is revealed, as he lives for Miyuki's sake.