Change of address post card

Mmmh ..this is a change of address post card.
Not so common in singapore but i understand
it is common in japan . Not sure where else
have this practice.

The design parameter for this card is to be simple
like out of a comic style illustration.
And feel is to be light and cheerful.

And because it is printed by a print shop instead of
a traditional printing factory,there is no minimum quantity
per colour way. So taking of this advantage,
there is in total four colour variation.

My hand sketch of the room on the left and the finished
postcard on the right