letter on the wisteria tree

This is a continuation of the story of The Light of Memory So my suggestion is to read The Light of Memory first so you know what happens in the story.

Au's explanation
After that incident, three months passed, many changes occurred everywhere and strange things happened. Vanilla Cross has changed drastically since 3 months later and now he works in a place espresso lab like before and she now can control his death eye and his darkness even though it can only be used twice a day But one day something strange happens and will she and his friends be able to find out and will Mandeleine and Espresso still be alive?