There was Earth, and then there was the unattainable Sky.
One day, a giant Tree emerged, serving as a boundary between the two worlds. Indeed, it is said that there is a concealed Kingdom somewhere far away in the sky. Only there was no one to reach it yet.

Children are born on the Treetops, serving to achieve that goal.

And I am one of them.

Flight Day is creeping closer. It is okay to be a little nervous, right?..

Soon, the time for departure will come.
We must leave, and break a shell of the world as our egg hatches.

Right.

I am akin to a bird myself, am I?

My prosthetic wings are soon to be mine, soothing phantom pains I felt since birth due to their absence.

Just wait and see.