UPDATE: English translation available in CC.

Here's an old interview from Ryukishi07, the creator of the Naku Koro ni series (When They Cry).

The name of his circle is 07th Expansion, and it consists of him, his brother, and a friend. His family also helps him in other ways.

Subs provided by: Rapa (https://www.youtube.com/channel/UCvLukJlm_9iNB_CoKyioYcQ)