Doujin circle/duo composed of Shiokonbu-F and Shiokonbu-K, who is actually Osamada Meika's another pen-name.
Circle name: 塩こんぶプロジェクト (Shiokonbu Project or Shio-konbu Project)
Circle member (1): 塩こんぶF (Shiokonbu F)
Circle member (2): 塩こんぶK (Shiokonbu K), also known as Osamada Meika