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...
Yes, I'm sorry.
Ja, tut mir leid.
Sí, lo siento.
Sí, lo siento.
Oui, je suis désolé.
Sim, eu sinto muito.