In Kinoko Nasu's first draft of Fate/stay night that he wrote while in high school, he had planned for Saber to be a man and the player character to be a woman in glasses. While the two genders were eventually flipped for the final game, this idea was revisited in "Fate/Prototype", an original video animation released as part of the Carnival Phantasm OVA collection. Fate/Prototype portrays Saber and the primary Master as described in the early drafts, but as of now, the full story of "Fate/Prototype" has yet to be told, with the animation and short story details being the only known aspects of this particular adaptation.