Big Sister and Little Sister Sayo mentions to Atsumi she has always wanted a little sister. Details Casts Posters Season Lists Title Big Sister and Little Sister Genres Animation Family Comedy Release Date 2012-06-13 Episode Runtime 00 Hours 03 Minutes Season Number 2 Episode Number 11 Production Companies Seven Ryotaro Okiayu... ... Rie Kugimiya... ... Tomoe Tamiyasu... ... Aya Uchida... ... Aya Hirano... ... Takahiro Sakurai... ... Original Size (680x1000) Season 1 13 Episode(s) 2012-01-06 Season 2 13 Episode(s) 2012-04-04 Season 3 12 Episode(s) 2013-07-01