Last Notes Manga Summary
From Shoujo-Sense:
Haru and Aki are the masters of the branch store—an old-looking and very unusual shop. It sells only one thing: a special kind of incense that, when burned, allows the user to see and speak with the spirit of the dead person that appears in the smoke. Every customer has a different reason for calling up the dead, and how they use this unusual opportunity is up to them...