No. 280, the house

No. 280, a house where Pigen and Piching live.
It stands on a hill. The hill stands on another hills.
Of course, we can't see the hills from the above picture
becuase they are hidden behind the black frame.
We just can see Pigen and Piching stand on the stack.

I have no idea why they both climb through the stack on the roof.
Can you give me a idea about it?
Also, do you see what they are looking at?

[the end.]
until your response