Chapter 19:
Koto takes her mother from the Shrine's Holy Grounds to the Looking Glass City.
Chapter 20:
The three siblings enjoy their time with their mother, but...
Chapter 21:
Koto tries to find out the secret of her birth from her mother, but instead she's asked to save her poor father.  With no place for her feelings to go, she takes them out on Myoue.
About myself, about Dad, about you...
Über dich, über Vater, über mich...
Acerca de mí, de papá, de ti...
Quiero saberlo todo sobre 
mí, sobre papá, sobre ti...
Sur moi, sur papa et sur toi.
Sobre mim, sobre meu pai, sobre você...