Chapter 10:
The Station Opening, the day when everyone in the city gets rid of what they don't need, begins, and a cup that is very important to Yase is thrown away.
Chapter 11:
Yase has lived her whole life surrounded by things that remind her of her mother, and Koto tries to get her cup back, but...
Chapter 12:
Koto tries to fix things between Kurama and Yase, and feels a connection to her mother between them.
The things you don't need 
can't simply disappear.
Die Dinge, die man nicht braucht,
 verschwinden nicht einfach.
Las cosas que no necesitas 
no desaparecen sin más.
Las cosas que no necesitamos 
no desaparecen sin más.
Notre monde est vraiment 
incompréhensible.
Não é possível que as coisas
desnecessárias simplesmente sumam.