Hoshiiro no Okurimono Portable (Japan) - PSP - Visual Novel

The story is set in a school that will be torn down in a few months. This is announced to the heroine, a student of the school, some months before her graduation. The heroine and her 3 other school mates (all boys) decide to start an astronomy club, so they can find the best starry sky and make some memories before their graduation.