High School D×D - Specials
1 - Before Harem Special
Air Date: December 19, 2011
2 - Going Sunbathing
Air Date: March 21, 2012
The Occult Research Club goes on a beach outing. Issei messes up applying sun lotion to Rias, and is punished by being beaten by Koneko with a baseball bat.
3 - Private Training With Akeno-senpai
Air Date: April 25, 2012
Issei is being given lessons in magic by Akeno. After getting beaten, he spills a parfait on her. She requests him to lick it off her chest. At this point, Issei wakes up in Asia's lap and gets shocked by Rassei.
4 - Koneko, a Little Bolder... Meow
Air Date: May 23, 2012
Koneko accidentally has her personality reversed magically, making her incredibly sexually active and reversing her sexual preference.
5 - Dress Break, the Inside Story of Its Birth
Air Date: June 27, 2012
A few flashbacks of how Issei first found out and eventually perfected his special move, Dress Break.
6 - Let's Make Udon
Air Date: July 25, 2012
As part of the penalty from a bet, Sona and Tsubaki make udon for the Occult Research Club; however an accident makes the udon come to life in a very peculiar way.
7 - Asia Transforms!
Air Date: August 29, 2012
Asia wants to prove she is just as bad as any demon by using ideas found in Issei's magazines, going as far as dressing up like a harlot and seducing him, but Issei tells her to just be herself.
8 - Boobs Bloom!
Air Date: September 6, 2012
Unaired 13th episode of season 1. A rumor is going about the school about how girls are disappearing and coming back ill and with their breast size decreased.
9 - I'm Searching for Breasts!
Air Date: May 31, 2013
Unaired 14th episode of season 1. Issei gets possessed by a perverted mummy.
10 - Broadcast Commemoration Special
Air Date: June 25, 2013
11 - Oppai, Tsutsumimasu!
Air Date: March 10, 2015
Unaired 13th episode of season 2. When Asia Argento is attacked by a monster that steals underwear, Rias Gremory, Hyoudou Issei and the rest of the gang step in to destroy it... only to be surprised by the monster's tentacle attack. As it turns out, Shidou Irina's target is not the monster but whoever has been controlling it. And so the hunt for the Legendary Sage, an underwear thief, is on...
12 - Rias and Akeno: Clash of the Women?!
Air Date: July 24, 2015
Rias and Akeno compete to see whose sexy roleplay has greater appeal for Issei.
13 - Church-Trio's Underwear Amen!
Air Date: August 26, 2015
Irina, Xenovia, and Asia compare their "battle underwear".
14 - Koneko's Senjutsu Treatment ~Meow
Air Date: October 28, 2015
Koneko has a healing technique, but does Issei have the wrong idea?
15 - Levia-tan and So-tan ☆
Air Date: November 25, 2015
Tsubaki can't decide between two magical girl costumes and convinces a reluctant Sona to try one one.
16 - Don't Revive the Phoenix
Air Date: December 9, 2015
Unaired 13th canon episode of season 3. Issei goes to the Underworld to help and train Riser Phenex who has lost all confidence in himself by the request of Ravel Phenex.
17 - Steamy Grayfia
Air Date: December 25, 2015
Grayfia isn't quite herself when she and Issei accidentally encounter each other in the bath.
18 - Rossweisse-sensei
Air Date: January 27, 2016
When Rossweisse helps Issei study for a test, it proves difficult to avoid inappropriately distracting him.