Summer Holiday Chapter is the 5th volume in the Mahouka Koukou no Rettousei Light Novel series. It consists of 6 short stories which occur during summer break or right afterward.
All events in this chapter take place at Shizuku's family's island. Shizuku invited the usual group to her family's island resort with the date chosen to fit Tatsuya's schedule. The scheduling is revealed to help Honoka get closer to Tatsuya. Shizuku confronts Miyuki about the sibling's relationship, which Miyuki replies that she loves Tatsuya, but not in a romantic manner. Meanwhile, Honoka confesses to Tatsuya, only to be told about Tatsuya's lack of the emotion called love. Honoka cheers up however, relieved to know that since Tatsuya won't ever be able to love someone, she can continue liking him without being a third wheel. Tatsuya reveals his chest scars and wonders what is up with Honoka's actions thinking them to be odd like Miyuki's. Mizuki and Erika talk about Honoka's actions. Tatsuya understands Mizuki's honest thoughts and non-desultory words on the matter. Erika tells her not to say that stuff because things got interesting which Tatsuya later agrees with her. However, Tatsuya disagrees with Erika's "got interesting" part.
The Honour Student's Supplementary Lesson
The Morisaki Family is revealed to hold a bodyguard business, which Morisaki Shun had participated in for two years. While on a stroll, Morisaki notices some men stalking a girl, Sun Meilin and steps in. After defeating the men using his "drawless" skill and later some other gang members without the use of magic, Morisaki successfully escorts her to a boat she was planning to meetup with.
The girl is later revealed as the head of No Head Dragon, Sun Richardson's adopted daughter.
Amelia in Wonderland
Akechi Eimi visits a theme park with two of her friends, but ends up lost when she realized vine fences are moving to stop her from leaving. She meets Hagane, working there as a part-timer due to family influences, when she was about to blast the wall with magic. The fence is revealed to be a magical trap and men appear to surround the two students, asking Akechi to teach them the magic "Magic Bullet Tathlum." She refuses and proceeds to defeat all the opponents along with Hagane with magic. The two parts way after promising to keep each other's magic a secret.
Friendship, Trust and the Dubious Lolicon
George is revealed to be a war orphan caused by the Great Asian Alliance and the New Soviet Union (though the latter party denied of participating)'s invasion three years before the current story. He was however saved from the fate of being sent to an orphanage due to his family's connections with the Ichijous.
Ichijou Masaki and George discusses about ways to improve their tactics to prevent future happenings like the duel against Tatsuya's team during the Nine Schools Competition. Masaki is revealed to be lovesick for Miyuki, and vows to ask her out after he surpasses her brother. It is also shown that Masaki's sister in sixth grade is interested in George, which led to rumors that he is a lolicon. The story ends with George's indication to be useful to the Ichijou family. George and Masaki's trust and friendliness is shown over this chapter.
Memories of Summer
On the last day of summer break, Miyuki and Tatsuya reminiscences about when they went shopping after the Nine Schools Competition for Miyuki's award in winning the Mirage Bat competition. The siblings buy three dresses and eats at an Italian restaurant, only to have a model producer pick a fight with them afterward with a few goons. Needless to say, Tatsuya finishes them off effortlessly without the use of magic.
After reminiscing, the two went to the bank, where they ran into bank robbers. The security of the bank took care of the robbers.
Presidential Elections and the Queen
Mayumi is tasked with finding candidates for the new Student Council President. Azusa refuses to participate while Hattori is selected by Katsuto to be the next head of the Club Management Group. Tatsuya refuses to participate and is against the idea to let Miyuki run for president as she is incapable to be a leader yet (note that she still isn't able to control her magic). Tatsuya bribes Azusa with the yet unreleased flying type CAD and succeeds in persuading her to run for the Student Council President position. Watanabe Mari wants Kanon to become the next Public Morals Committee's Chief.