Kono Aozora ni Yakusoku o Wikipedia
Kono Aozora ni Yakusoku o (このにを―, "The Promise I made over this Blue Sky") is a Japanese adult visual novel produced by Giga, originally released on March 31, game was ported to the PlayStation 2 in 2007, the PlayStation Portable in 2009, and the PlayStation Vita in 2015 came with additional content although the adult content was removed.