Not in the vote, but still relevant. Here's review for another moe/sci-fi game in comparison with Hoshizora no Memoria:
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/jp/thread/2529802
http://zepy.momotato.com/2008/05/17/doujin-game-himawari/
>Anyways, the main character, Hinata Youichi, was the sole survivor of a spaceplane crash that killed more than 500 persons alongside his family 2 years ago, he lost his memories in that accident, he now lives alone though he is helped by his friend and classmate Saionji Asuka.
>One day while looking at the stars, he and his best friend and sempai Amamiya Ginga witness the crash of space craft, from it he met a girl called Aries who lost all her memories except her name in the crash.
She also possess mysterious healing power, not knowing what to do, who she is or if she is even a human, he decides to take her to his home.
>Thus begin his cohabitation with the mysterious "alien" loli, that's pretty much the setup at the beginning.
>Of course the setup is pretty generic and there was no fucking way it could have gotten so much raving reviews and hype if it was all that there was to it.
The story is divided into 4 different routes, 3 are done in the main game in 2050 and focus on a specific female character and one take place in 2048 with a completely different POV and setting.