Tsui no Stella
Tsui no Stella - Key
If I make it to the other side of the sky, I can become human...
Earth has been taken over by a group of machines that created a "singularity." Humanity is forced to live hidden in the shadows.
One day a transporter receives an odd request. Their cargo this time will be a girl android developed as a family member substitute. She is unaffected by the Singularity Machines.
Despite being put off by the girl's naive behavior, the transporter sets out on the journey. Sometimes it's human bandits they must evade, other times it's the machines they run from. Undeterred by such dangerous situations, they press on to make the delivery.
The girl often talks about wanting to become human. Their destination is a space elevator, so tall it appears to pierce the sky. The rumor is that androids who make it to the top can be made human, but is it true?