Until she became a high school student, due to the the protagonist’s (Hayama Haruho) father’s job, she had to repeatedly transfer schools. One day, she receives a single letter from a boy she met at one of the many places she had moved to.

Enclosed is a letter and a photograph of him.

Form then onwards, the nostalgic relationship between him and Haruho begins.

Accompanied by Richard, an English boy who loves Japan and is currently home-staying at Haruho’s, she journeys to the place where that boy now lives…

This is a travel romance story that began from a single letter…

Who will you choose to visit?

[Translation of the official website's story summary.]