Hoshizora no Memoria -Wish Upon a Shooting Star- first launched in Japan back in 2009. In 2012, a fan translation patch was released which allowed more English-speaking fans to experience this romantic visual novel.
The story begins with a young man named Kogasaka You who has just returned to his hometown after years of being away. On the fateful day he moved out, he promised his best friend that they would marry once they became adults. Now that he’s back, he can’t find this friend everywhere — but he does meet a mysterious young girl who looks strangely very much like her.
The original release of Hoshizora no Memoria was rated 18+, but as of this moment, Sekai Project have only confirmed a (presumably all-ages) Steam release.