 While creating the story, Aoyama expressed difficulty incorporating English in the text.He also revealed Minerva Glass, a fictional tennis player in the story, was based on professional tennis player Steffi Graf and the scene where Conan calls out to Minerva during her tennis match was inspired by an event during the 1996 Wimbledon Championships where a fan jokingly shouted his proposal to Graf during her semi-finals match.For Shinichi's confession to Ran, Aoyama created the scene with Sherlock Holmes' poor ability with relationships and the phrase in mind.