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.
If we get rid of the things 
that are important to us,
Wenn wir Dinge wegwerfen, die uns wichtig sind,
Si nos deshacemos de las cosas que 
son importantes para nosotros,
Si nos deshacemos de aquello 
que es importante para nosotros,
Si on envoie un objet
empreint de souvenirs à la dérive,
Se nos livrarmos de coisas importantes para nós,