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.
Sampai Ep 4Bakuon!! no KobeyaAnime
Sampai Ep 12Corpse Princess: KuroAnime
Sampai Ep 1My Hero Academia: Two Heroes SpecialsAnime
Sampai Ep 12Ground Control to Psychoelectric GirlAnime
Sampai Ep 1From Up on Poppy HillAnime
Sampai Ep 24Code Geass: Lelouch of the Rebellion Picture DramasAnime
Sampai Ep 12Tanaka-kun is Always ListlessAnime
Sampai Ep 10My First Girlfriend is a GalAnime
Sampai Ep 25The Melancholy of Haruhi-chan SuzumiyaAnime
Sampai Ep 24Baki the GrapplerAnime
Sampai Ep 25Bakuman.Anime
Sampai Ep 12Food Wars! The Third PlateAnime