: This is likely a reference to the 2010 animated movie known in English as The Secret World of Arrietty .
: This may refer to the first chapter of The Borrowers by Mary Norton, the book that inspired the film. Karigurashi no Arrietty Episode 1
: This could refer to the first chapter or volume of the Karigurashi no Arrietty manga series. : This is likely a reference to the