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.
By the way, this is a bit 
difficult to admit to you,
،بالمناسبة، يصعب الإقرار بهذا قليلًا أمامكما
Ach ja, ich sag’s ja nur ungern,
Por cierto, es difícil sacar este tema,
Por cierto, es difícil sacar este tema,
En fait, je ne suis pas fier…
Sentite, è un po' difficile parlarvene, ma...
Falando nisso, dói um pouco admitir,
mas eu deixei passar uma pechincha.
Кстати, неудобно вам это говорить,