A brief description of the manga EDEN’S ZERO:
The boy Shiki lives together with his friend Michael, a robot, in the former amusement park Granbell, which is inhabited exclusively by robots. Shiki’s grandpa, who always told him about the importance of friendship, died some time ago.
Thus he is the only person on the island and his task is the maintenance of his robot friends. When one day the young video blogger Rebecca appears together with her flying cat Happy in the amusement park, she is first greeted nicely and friendly, but the minds of the robots seem to change…