So, this is another key's sadness visual novel, I have played Clannad and watched Clannad, Air, Kanon, and many key's animes. This time key brings us a sadness but thoughtful story with a robot girl whose name is Hoshino Yomemi, which means the beautiful dream of the stars. I have read the whole Planetarian novels after played this game, so that I know the whole world of this novel series.Yomemi is a lovely girl, I DON'T think she is a ROBOT, but a HUMAN with all the beauties and she stands for the brightness of humanity. She is innocent and just like a child. Human destoried everything but she still believed that everything will become fine one day. I think the precious memories of Yomemi are the most moved part of this novel and I cried for nearly 2 hours after I watched that part. After played this game, I thought a long time, why human beings began to kill each other? Maybe they lost their emotions like love and mercy. After all, all these loves and mercies are given to Yomemi and she became the hope of human maybe. Though her body dead in the end, but her spirit was taken by us. By the way, the next novel called Man of Stars(maybe, I read this story in Chinese), in that story, our main character became a old man and show other people the beauty of stars, just like what Yomemi was done to him, and finally in a small village in South America, he dead with another robot which the same type of Yomemi, in that time, the South America was covered with ice and people could hardly survive. In that village, our main character teached 3 children many things of stars, knowledges, and some past stories. It's a sad end. Human couldn't avoid disappearing from this planet, but our spirit, our love, the dream of heaven, the heaven that won't be seperated, the hope, won't disappear.Actually, I think this game worth this price, in my opinion, it's even more worth than 60$, it makes us to thought what's the true love, what's the humanity, and I think it's even more thoughtful than some text book.