「ガールフレンド（仮）」

Girl Friend Beta (ガールフレンド（仮） Gāru Furendo Kakko Kari) is a smartphone game developed by CyberAgent for iOS and Android devices which has over 5.3 million users.

An anime television series produced by Silver Link has also began airing in Japan in October 2014, and five manga adaptations based on the game have also been released.

Official website (JP)[girlfriend-kari.jp]
Official browser game (JP)[vcard.ameba.jp]
Wiki[girlfriend-kari.wikia.com]