High School DxD (Season 1)

High School DxD is a supernatural action anime series based on the light novels written by Ichiei Ishibumi and illustrated by Miyama-Zero, published by Fujimi Shobo. The story centers on Issei Hyoudou, a perverted high school student who is nearly killed by his first date, who is revealed to be a Fallen Angel. He is soon saved by Rias Gremory, a crimson-haired beauty who reveals herself as a Devil of the Gremory Family, and finds out that he himself has been reborn as a Devil made to serve her. The story focuses on the ongoing battle between the Fallen Angels, Angels, and Devils, and Issei's ongoing relationship with Rias. The first season covers the Red Dragon Emperor's Awakening arc of the light novels.

The anime was produced by animation studio TNK under the directorship of Tetsuya Ynagisawa, with the script written by Takao Yoshioka, music by Ryosuke Nakikashi, characters by Junji Goto, and produced by Hisato Usui, Jun Hatano, Shigeru Saito, Shinsaku Tanaka, Takuro Hatakeyama, and Tetsuya Tsuchihashi, respectively. Season 1 aired on AT-X from January 6, 2012 to March 23, 2012, with subsequent broadcast runs on TV Kanagawa, Chiba TV, TV Aichi, Sun Television, Tokyo MX and BS11. AT-X airings of the season were uncensored, while the airings on TV Kanagawa (which began on January 11, 2012) and other networks were heavily censored. Six Region 1 DVD and Blu-ray compilation volumes were released by Media Factory between March 21, 2012 and August 29, 2012, each containing a three-minute OVA short entitled "Release the Swaying Delusions" (妄想爆揺解除オリジナルビデオ Mōsō Bakuyure Kaijo Orijinaru Bideo, lit. "Release the Swaying Delusions Original Video") and other bonus material.

An unaired 13th episode was bundled with the limited edition release of the 13th light novel on September 6, 2012 on Blu-ray disc. The episode focuses on Rias moving in with Issei and Asia following the events of the former's duel with Riser Phenex, with the script for the episode written by Ichiei Ishibumi himself. An unaired 14th episode, written by Ishibumi himself, will be bundled with the limited edition release of the 15th light novel in May 2013 on Blu-ray disc.

In North America, the first season of High School DxD is licensed by FUNimation Entertainment, who simulcasted the series (in its censored format) on their video website and on their Hulu page. FUNimation will also release the series on DVD and Blu-ray. The first season is also licensed in Australia and New Zealand by Madman Entertainment.