Silver Moon

Our protagonist grows up in Geo, a facility that gives special education for gifted children.
He rejects life as an elite and instead lives a normal college life.

Suddenly, he's confronted with a woman called V.A. who informs him about his abnormal physical condition and declares he has 15 days left to live.

The four girls surrounding him, the secret of "Geo", and the intentions of the mysterious V.A... How will he survive the remaining 15 days of his life?

[Translated from the DLSite]