When you borrow a book from the library, you can always find many forgotten things in the book, a leaf, a post-it note, a letter specifically written to the next reader...
J got such a letter in the library and began her correspondence with the woman named T, becoming the first member of the letter club. Two strangers were connected because of their interest in the same book, and such a fragile relationship began to exist on this small earth.
Concept: Souls in love always understand each other