Twilight of the Sleepless City

On Sky Island, there lived a young girl named Emma, who lived alone. Her father had disappeared when she was young, so Emma worked diligently every day and secretly created a robot named 818. 818 was a compassionate robot, and it lived happily with Emma. However, one day, people discovered 818…
Will Emma and 818 be able to stay together?
What happened to Emma’s father?
What choices will Emma make?