uchi_no_imouto_no_baai
Eroge by EGO
Japanese title: うちの妹のばあい
Artist: Kazami Haruki (風見春樹)
See also
* The official site of the game
* The Visual Novel Database:
** Uchi no Imouto no Baai (Heart)
** Uchi no Imouto no Baai Pure Love Edition
* Getchu: うちの妹のばあい 純愛版