The light novel series High School DxD is written by Ichiei Ishibumi and illustrated by Miyama-Zero. It has been published in Dragon Magazine since September 20, 2008 under the Fujimi Fantasia Bunko imprint. The series follows Issei Hyodo, a lecherous high school student attending Kuoh Academy who is killed on his first date. He is later brought back to life as a devil by Rias Gremory, a beautiful crimson-haired girl who is the heiress of the Gremory Family of devils and President of the Occult Research Club, and must work his way to the top so that he may one day fulfill his dream of building a harem.
The first volume of High School DxD was released by Fujimi Shobo on September 20, 2008. As of January 19, 2013, fourteen volumes have been released under their Fujimi Fantasia Bunko imprint.
Ishigumi has retroactively grouped the light novels into story arcs. The first arc, titled The Red Dragon Emperor's Awakening (赤龍帝覚醒 Sekiryūtei Kakusei?), ran through the first two volumes. Birth of the Breast Dragon Emperor (乳龍帝誕生 Chichiryūtei Tanjō?) is the second story arc and follows volumes three through six. The Heroic Oppai Dragon (英雄(ヒーロー)おっぱいドラゴン Hīrō Oppai Doragon?) follows volumes seven through twelve. The fourth arc, The Legend of Oppai Dragon and his Lively Companions (おっぱいドラゴンと愉快な仲間たちの伝説 Oppai Doragon to Yukaina Nakamatachi no Densetsu?), starts at volume 14 and is the series' current arc. The light novels also feature a series of side stories set in between the main storyline, and are often compiled into volumes. So far, three short story collections (Volume 8, Volume 13 and Volume 15) have been published.