The principal adores his grandson very much and asks the Sket-dan to prepare a picture play to entertain him. They decide to base the story off of Momotaro, but change things up from the usual... Afterwards, he asks them to play with his grandson for an afternoon, but the kid doesn't seem interested in having fun at all.
I see! So we'll do an adaptation 
of an existing story.
Ya veo. Adaptaremos una 
historia que todos conocen.
Ya veo. Adaptaremos una 
historia que todos conocen.
Boa! Uma adaptação de uma
 história que já existe.