Circus is a Japanese visual novel studio known for creating adult-oriented bishoujo games. In addition to the normal Circus brand name, there are other brand divisions including Circus Northern, Circus Fetish, Circus Metal, and Sanctuary. Circus has also been involved in collaboration projects, creating titles such as True Tears, a collaboration with Broccoli, GameCrab, and Japanese artist Izumi Rei published under the brand La'cryma, and Sora o Tobu, Mittsu no Houhou., an adult-oriented collaboration with Broccoli released under the same brand name.

(Source: AniDB)