The property did have an OVA back in 1994 and it had a TV series in 2000 that ran for almost a year.
The shorts are only going to be online for about two weeks for each episode but will likely be collected with the home video release.
With the main series for Magic Circle getting underway this summer, Kadokawa also has some shorts that they’re showing on AT-X and Hikari TV in Japan as well as streaming with Guru Guru Puchi Anime Gekijō.