Tsukiko Yahisa is a college student majoring in astronomy. One day a single e-mail brings memories of the good old days at Seigatsu Academy. All those friends she made throughout the year, now scattered - sh...

Series of one shots of all the characters in the four games released so far.

Perched atop a hill with a clear view of the stars, Seigatsu High School is a boarding school specializing in astronomy. The only girl enrolled in Seigatsu High School, Yahisa Tsukiko, lived an idyllic life...