"노래하는 혹" 소책자에 “BBB에 의해 제작·연출”되었다는 기록이 있으므로, 우선 이들은 모두 BBB에 소속되거나 관련된 자들임을 짐작할 수 있다.
Since there is a record that it was “produced and directed by BBB” in the booklet “Singing Lump", it can be guessed that they are all affiliated with or related to the BBB.