Saishū Shiken Kujira (最終試験くじら, "Final Examination Whale") is a Japanese visual novel developed by Circus and was first released on December 23, 2004.
In 2007 the game was adapted by studio Zexcs as an original net animation (ONA) series.
Saishu Shiken Kujira's gameplay requires little interaction from the player as most of the game's duration is spent reading the text that appears on the game screen, which represents either dialogue between the various characters or the inner thoughts of the protagonist.
Gameplay pauses at these points and depending on which choice the player makes, the plot will progress in a specific direction.
With the consumer ports, if an undesired choice was selected, there would be an option to rewind the story to correct the mistake.