Es ist Sommer. Die Gruppe befindet sich auf einer südlichen Insel und überall sind Mädchen in Badeanzügen. Arata brät unerklärlicherweise Yakisoba, aber so etwas passiert eben. Der Direktor bringt die von Aratas Zerfallsphänomen verwüstete Schule wieder auf Vordermann. Die Mädchen genießen ein gemischtgeschlechtliches Bad und der Teufelsanwärter entscheidet sich für ein Thema – Kontrolle.
Before all of the students in the academy went to the southern island, it's shown that Yui saved Arata from certain death by dragging him into her dream world. She then proceeds to tell him about magic and the seven archives of magic. She also explained he might able to control his powers by choosing his thema, which is founded in either of the archives. He then proceeds to stop the Breakdown Phenomenon after being released by Yui and choosing his thema. The magic that stopped the Breakdown Phenomenon also caused all the people around him, except Mira, who reflected his magic, to have their clothes dispelled and destroyed. On the island, he showed Serina his new-found magic prowess, breaking her swimsuit in the process. In the hot springs, Arata requested that Lilith demonstrate her magic. She reluctantly accepts it after Arata's constant pleading. After witnessing her spell, Arata requests the grimoire to copy the spell for him, which works out successfully, surprising the entire group.
Bien que certains trouvent que c'est un peu tôt, il est temps pour Arata de devenir un magicien, et donc, de trouver son thème. Quel sera-t-il ? Dans quelle archive ? Et quels en seront les effets ?
夏の海、南国の島、水着姿の美少女たち。
なぜかアラタは焼きそばを焼いている。仕方がない。彼のせいで崩壊した学園を、学園長が修復しているらしい。美少女たちと混浴温泉を楽しみながら、魔王候補アラタはテーマを決定する「支配」だ！
Arata no conoce ni controla totalmente su poder y eso es algo que tendrá que hacer si quiere mantener su alrededor en calma. Esta vez lo veremos ser partícipe de un especial encuentro con algunas de las chicas.
Viene l'estate e la graziosa comitiva va al mare ed Arata sta cucinando yakisoba. Nel frattempo, la scuola è in fase di riparazione a causa del precedente fenomeno di decadimento, provocato dallo stesso Arata, che l'ha distrutta. Il candidato a signore dei demoni, intanto, sceglie il suo tema: il controllo.
