It contains many parodistic elements, beginning with Kohaku becoming Saber's master in a new Grail War and continuing with Arcueid Brunestud becoming the magical girl Phantas-moon.
The releases are episodic in nature, with each addition not only adding new scenarios and characters but also improving the graphics and gameplay. Four different 'acts' were released annually from 2005 to 2008, coinciding in a final compilation of all four in 2009, The Best, which includes extra content.