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.
Kuina-san looked into it for me. He found out
 that Shiginuma Shouko bought that book.
.كوينا-سان تحرّت بشأن الأمر لأجلي
.واكتشفت أنّ شيغينوما شوكو اقتنت ذلك الكتاب
Herr Kuina hat für mich recherchiert
Kuina-san investigó por mí
Kuina-san investigó por mí
Kuina a fait des recherches,
Kuina ha indagato per me.
Kuina pesquisou para mim. Shoko
Shiginuma comprou aquele livro.
Куина разузнал для меня. Кудзэ узнала,
что Сёко Сигинума купила ту книгу.