Brian W Aldiss' "Outside" (short story, mystery, free): Who am I?

A house with 6 grown-up inhabitants - 4 men & 2 women, none related to each other. None have ever been outside it. None do anything. Magically, everyday in the morning, food & supplies appear on a shelf in a room.

One fine day, one of them begins suspecting something unusual about their arrangement...

Fact sheet.

First published: New Worlds, January 1955.
Download full text from Internet Archive.
Rating: B.
Among the classics of SciFiction edited by Ellen Datlow.
Related: Stories of Brian W Aldiss.