Unexpectedly, I had found a paperback at the hospital. It was titled "Disease Coexistence Journal".

It was a secret diary written by my classmate, Sakura Yamauchi.

Inside, it was written that due to her pancreatic disease, her days were numbered.

The girl that was already suffering from illness had to confront an equally cruel reality.

Spun by "I who had no name" and "her who had no everyday life" – a tale that begins from the end.

The award-winning debut work by Yoru Sumino:

"Bookstore Grand Prix 2016" – 2nd Place

"DA VINCI BOOK OF THE YEAR" – 2nd Place

"Bestsellers 2015 (LIterary Books) by TOHAN" – 6th Place

"Reading Meter – Ranking of Books I Want to Read" – 1st Place

"Top Picks by Saitama High School Librarians 2015" – 1st Place

As of August 2016, this book has sold over 580, 000 copies.