Specials included with the Blu-ray/DVD volumes.

Episode 01: Rito becomes a Woman Lala invents a gizmo to make her bust bigger. However, this invention of hers accidentally turns Rito into a woman. Episode 02: Rito and Mikan Feeling lonely because Rito is always spending time with Lala, Mikan storms out of the house. While Rito and Lala are out looking for her a few flashbacks from the past, showing Rito and Mikan as kids, are shown. Episode 03: Welcome to the Southern Resort!! Haruna wins an island resort trip for ten females. Rito gets turned into a dog by one of Lala's inventions and somehow ends up on the island as well. Episode 04: Trouble Quest Rito and the girls become trapped inside an RPG game where the objective is to save Lala and defeat the evil witch Kyouko. Episode 05: Nana and Momo Lala's sisters cause mischief for Rito and his harem at a cherry blossom viewing. Episode 06: Draft, Metamorphose, Hand & Tail Yami and Yui confront with a senior, causing Yui to lose her panties. Mikan finds Peke taking snapshots of new clothing while shopping. Suddenly, a stranger steals her bag. As Rito tries to explore Lala's cleaned-up bedroom, he accidentally activates one of Lala's invention, fusing his hand to Lala's tail.

#1: Oppai, Minorimasu! (Episode 13) A rumor is going about the school about how girls are disappearing and coming back ill and with their breast size decreased. #2: Oppai, Motomemasu! (Episode 14) While observing how the others do their jobs so they can do theirs better, Issei and Asia go with Rias to see if a coffin is cursed. During the investigation Issei is possessed by an Egyptian magician named Unas, It just so happens that Unas is just as perverted as Issei. Unas will only leave Issei's body if they can release Unas from the curse placed on him by a devil that Unas tried to make his bride.

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)