Two OVA episodes featuring additional stories. Episode 0: Ritsu and Takano used to date back in high school, but broke up due to a misunderstanding. This is that story. Episode 12.5: Hatori and Chiaki go to visit the latter's family. It's really awkward in many, many ways.
Up to EP 8Kare Baka: Wagahai no Kare wa Baka de RAnime
Up to EP 12Magic of StellaAnime
Up to EP 2Code Geass: Lelouch of the Re;surrection Picture DramaAnime
Up to EP 12Poco's Udon WorldAnime
Up to EP 1Uchuu Senkan Yamato: Kanketsu-henAnime
Up to EP 12KaginadoAnime
Up to EP 1Nurarihyon no Mago: Gekitou Dai Futsal Taikai! Nuragumi W Cup!!Anime
Up to EP 1One Piece: Episode of Sabo - Bond of Three Brothers, A Miraculous Reunion and an Inherited WillAnime
Up to EP 52Pac-WorldAnime
Up to EP 2Knight Hunters OVAAnime
Up to EP 13Baki: The Great Raitai Tournament SagaAnime
Up to EP 12Gekidol: Actidol ProjectAnime