Tecnically, the show is a vignette. Vignette's usually have a basis, but no plot. Other Vignettee's include The Me Nobody Knows and Runaways.
More technically, it's a series of vignettes with a common theme. Vignettes themselves are merely short descriptive scenes. They could include mini-plots (i.e. character with an objective or action within the course of the scene) but they do not have a complete beginning, middle and end.
Videos