A series of 3-5 minute specials that were bundled with the HighSchool DxD DVD and Blu-rays. They are a stand alone set of episodes that are not a part of any story line in particular.
Special 1: Going Sunbathing! - The Occult Research Club goes on a beach outing.
Special 2: Issei's Private Training! - Issei is being given lessons in magic by Akeno.
Special 3: A Little Bold, Koneko-Chan... Nyan! - Koneko accidentally has her personality reversed magically, making her incredibly sexually active and reversing her sexual preference.
Special 4: The Untold Story of The Dress Break's Birth! - A few flashbacks of how Issei first found out and eventually perfected his special move, Dress Break.
Special 5: Making Udon! - As part of a penalty for losing a bet, Sona and Tsubaki make udon for the Occult Research Club but the udon comes to life in a peculiar way...
Special 6: Asia Transforms! - 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.
(Source: Wikipedia)+ More
More Seasons
Characters & Voice Actors

Hyoudou, Issei
Main
Kiba, Yuuto
Main
Katase
Supporting
Matsuda
Supporting
Motohama
Supporting
Murayama
SupportingRecommended for you
Pokemon: Pichu Bros. in Party Panic
Special
58m
Occult Academy Specials
Special
4m
Wo de Ni Tian Shen Qi
ONA
17m
Wingman
TV
24m
Akuma no Riddle: Shousha wa Dare? Nukiuchi Test
Special
23m
Amagami SS+ Plus Picture Drama
Special
7m
Sorcerer Hunters
OVA
28m
Absolute Duo
TV
24m
Action Heroine Cheer Fruits
TV
24m
Comic Party Revolution
TV
24m
Dirty Pair Flash 3
OVA
27m
Comic Party Revolution OVA
OVA
30m