In the Fate War, the fight between all the masters is tense and fierce, but it does not prevent them from doing what they like on days when there is no fighting. For example, the current head of Einsbern's family in Royal Sanzhong, Irisviel, is a popular online writer. Her representative work is the love novel "Fuyuki's Love" serialized in "Fuyuki Chronicles". The time in the story begins the week after Irisviel was attacked by the priest.