Serendipity language was by Horace Walpole in 1754. In a letter he wrote to his friend Horace Mann, Walpole explained an unexpected discovery he had made about a (lost) painting of Bianca Cappello by Giorgio Vasari by reference to a Persian fairy tale, "The Three Princes of Serendip". The princes, he told his correspondent, were "always making discoveries, by accidents and sagacity, of things which they were not in quest of". The name comes from "Serendip", an old name for Sri Lanka (Ceylon), hence "Sarandib" by Arab traders. It is derived from the Sanskrit "Siṃhaladvīpaḥ" (Siṃhalaḥ, Sri Lanka + dvīpaḥ, island).
Ef: A Fairy Tale of the Two year around the same time at the beginning of the first chapter of the story. Yuko hints of events that are revealed throughout "Ef: A Fairy Tale of the Two". After the conclusion of the first chapter, the story cycles back to the prologue and the talk between Yuko and Yu. Yuko ends with her talk about the events in the first chapter. At the end of the second chapter, the story shifts again to the scene with Yuko and Yu. Yuko finishes her talk on the events from the second chapter and says that she misses talking to Hiro,