Oan Monogatari: Sono Natsu, Watashi ga Shitta-koto also features the voice talents of Suzuko Mimori as An, Haruka Yoshimura as Ane (“Elder Sister”), and Ayaka Imamura as Oan.
To celebrate the 100th anniversary of its municipal organization, the city of Ogaki in Gifu Prefecture has commissioned a 9 minute short anime film entitled Oan Monogatari: Sono Natsu, Watashi ga Shitta-koto (“The Tale of Oan: What I Learned That Summer”) which highlights the history of the area and promotes local tourism.