In addition to the flash anime, 3 short special episodes were included on the Ane Log Fan Disc. Episodes : #1: Sekai no Ane Ijin no Jikan #2: Moya-nee Boot Camp #3: Ane Denwa Soudan
Watch Sister's Log: Moyako's Never-ending Monologue Specials episode 1 online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.