Yosuga no Sora (lit. Sky of Connection) is a Japanese romance/drama adult visual novel developed by CUFFS ("Sphere"). The game was originally released for Windows on December 5, 2008.It was adapted into a serialized manga and an anime television series. A sequel/fan disk titled Haruka na Sora was released later on October 24, 2009, which contains new and expanded scenarios for several characters from the original game.