Chapter 7:
Kurama, the de-facto ruler of Looking Glass City, tells Koto that their mother is the black rabbit.
Chapter 8:
Kurama has been intellectually curious from a young age, and loved it when his father praised his inventions.  He wants to find what he can do outside of the Looking Glass City.
Chapter 9:
The identities of Doctor Shouko and Fushimi are revealed...
From now on you three are siblings.
Jetzt seid ihr drei Geschwisterchen.
Desde ahora los tres son hermanos.
Desde hoy, los tres seréis hermanos.
Vous serez frères et sœur,
désormais.
De agora em diante, são seus irmãos.