Total Recommendations: 2
Both has the same Visual Novel Company and it makes Science Fiction very realistic. A little bit fun in the first, but it will be getting very serious about the story and it can make you believe what will happen in the future.
They have same kind of story, not really same but, its like at first they knew nothing about themselves, after that they found out something great, worth to do, and to continue their lifes with it. They got same ost composer too, great singer. This anime is worth to watch!