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...
You didn't try anything with Koto because
Du versuchst doch hoffentlich nichts mit Koto,
¿No habrás intentado algo con Koto en 
lugar de ir a pasar la noche con alguna mujer...?
No me digas que has intentado algo con Koto 
en vez de irte por ahí con alguna mujerzuela...
Ne me dis pas…
Não me diga que você tentou
alguma coisa com a Koto