Trinity Seven volume 10 features story by Kenji Saito and art by Akinari Nao.

It's time for the main event of the school festival, the Magic Research Battle! All of Trinity Seven (plus Arata) are arming themselves for battle against tough opponents from the rival Royal Magic Academies, but first they'll have to face--each other!? It's a knock-down, drag-out fight to the finish with only one pair left standing!