Original "chibi" styled animations of Imouto sae Ireba Ii. posted on the anime's official Twitter channel. Also included on the BD/DVD releases.
Up to EP 12RErideD: Tokigoe no DerridaAnime
Up to EP 1UtsunomikoAnime
Up to EP 1Hyperdimension Neptunia: The Eternity (True Ending) PromisedAnime
Up to EP 1Kuroko's Basketball SpecialAnime
Up to EP 26Fruits BasketAnime
Up to EP 1Carnival Phantasm: Illya-jouAnime
Up to EP 24Peace Maker KuroganeAnime
Up to EP 1Recovery of an MMO Junkie SpecialAnime
Up to EP 1Asako Get You!!Anime
Up to EP 26Major S1Anime
Up to EP 13I Can't Understand What My Husband Is Saying: 2nd ThreadAnime
Up to EP 24The Outcast Season 2Anime