The Heroic Oppai Dragon (英雄ヒーローおっぱいドラゴン, Hīrō Oppai Doragon) is the third story arc of High School DxD. The story arc follows Volumes 7 through 12 of the novels, with Volume 8 being a series of side stories. The first volume of the arc was covered in the third anime along with the remaining 2 volumes of the previous arc.


Part 1: Ragnarok After School

Part 2: The Work of a Devil

Part 3: Pandemonium at the School Trip

Part 4: Lion Heart of the School Festival

Part 5: Ouroboros and the Promotion Test

Part 6: Heroes of Supplementary Lessons



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