Trinity Seven, Vol. 12: The Seven Magicians, Paperback

(Volume 10)
It's time for the main event of the school festival, the Magic Research BattleAll 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