While out on their rounds one day, Tsugumi and Hisui learn of the existance of a book written by a prostitute from Yokohama's redlight district. Hisui seems especially desperate to get his hands on this book and when Tsugumi learns the reason why she becomes determined to help him. When Tsugumi discovers that Shiginuma Shouko, wife of the shady owner of the Nachtigal dance hall, she finds herself stepping back into potentially dangerous territory alone.
If you read this, you'll 
understand how she felt
إن قرأت هذه، ستفهم كيف شعرت
Wenn Sie das hier lesen,
verstehen Sie Hiwakos Gefühle
Si lees esto
comprenderás cómo se sentía Hiwako
Si lees esto
comprenderás cómo se sentía Hiwako
Lis son journal et tu comprendras
ce qu’elle ressentait.
Se leggerai questo,
Lendo isso, vai entender os sentimentos dela
e o quanto ela se importava e amava você.
Если прочтёшь, ты поймёшь её чувства,