Plot: True Tears is a Japanese visual novel developed by La'cryma, a collaboration between Broccoli, Circus, GameCrab and Rei Izumi, and was originally released on March 31, 2006 for the Windows as a DVD in Japan rated for everyone, followed by a Hong Kong and Taiwanese release on March 31, 2007. Wikipedia...
Plot: Valkyrie Complex is an adult simulation role-playing game developed by Circus that was released for the PC on May 29, 2009. It is abbreviated as VC. A manga based on the game has been released and an anime adaptation has been announced. Wikipedia