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.
From the look on your face, 
there's no doubt, then.
Wenn man in dein Gesicht sieht,
 besteht wohl kein Zweifel.
Por la mirada en tu cara, no hay duda.
Por la mirada en tu cara, no hay duda.
Ta réaction 
ne laisse aucun doute.
Pelo seu olhar, não restam dúvidas.