The origin of the name of the FEI family is not only because of the names of two of them - Fei and Fei - but also because this is a veritable "family of non-human creatures". To put it bluntly, those two are not human!
The story takes place on Earth at an uncertain time and place, and captures snippets of the FEI family's spoof life~
(Actually, this article is a spoof of myself by a certain CP on a certain forum... Embarrassing)
Intention: