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.
The color of his eyes and hair are 
because he's the child of a foreigner.
.لون عينيه وشعره المختلف يرجع لكونه ابن أجنبيّ
Seine Augen und sein Haar sind so,
weil er das Kind eines Ausländers ist.
El color de su cabello y sus ojos
denotan que es hijo de un extranjero.
El color de su pelo y sus ojos
denotan que es hijo de un extranjero.
En voyant ses yeux et ses cheveux,
Ha quel colore di capelli e di occhi
perché è figlio di uno straniero.
A cor dos seus olhos e cabelo
mostra que ele é filho de um estrangeiro.
У него такие глаза и цвет волос,
потому что он — дитя иностранца.