As a normal student studying history, you know the books of Liyue like the back of your hand, yet there's always been a vague sense that something is missing...

Today, as always, while in the library, you come across an old book with no cover and only has beautiful, old Liyuean handwriting on its first page. The only words are: 'To you my lover in thousands of years.'.

Seemingly belonging to the distant past. And somehow, there's something about it that strongly attracts you....