"Let's meet at the place where it all began." The true plot is revealed as Takuru travels to the Hikariwo. There he eets the other person behind the series of brutal killings.  But a deeper mystery lurks in the background: what Serika is telling him doesn't make sense, and he's convinced that as horrible as the story is, there's more to it than even he knows.
Why did you tell me that over the phone?
لماذا أخبرتِني بذلك على الهاتف؟
Warum hast du mir das
am Telefon erzählt?
¿Por qué me dijiste
eso por teléfono?
¿Por qué me dijiste
aquello por teléfono?
Serika, pourquoi tu m’as dit ça
au téléphone ?
Perché al telefono hai detto quelle cose?
Por que me contou 
aquilo pelo telefone?