13. Bölüm: GAUS birimleri Spider jeoçerçeveyi savuştururken öğrenciler kültürel festival için hazırlanıyor ve Efi Dorg cosplay olayı yaşanıyor

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Kuromukuro and the two GAUS units fight to drive the Spider geoframe controlled by Mirasa from the urban area. The Spider geoframe is injured and she retreats to enable it to recover. Yukina's class plans for the school's cultural festival and decides on the theme "Teach me Efi Dorg" as there are three pilots in the class. The class's students prepare for the festival through the night, building a large geoframe replica. Yukina and Kennosuke bring food for them on the artifact "Horse" which is later air-lifted back to base by a UN helicopter. Efi Dorg Muetta attends the school festival cosplay competition in her battle suit that is mistaken for a costume. While the Efi Dorg forum is in progress, Muetta appears and attacks Kennosuke. Kennosuke is stunned when he sees Muetta's face which resembles Princess Yukihime which allows Muetta to stab him with her sword. (Source: Wikipedia)