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.
Dad's the one who brings all the problems.
Immer ist es Vater, der die Probleme bereitet.
Papá siempre es el que 
causa todos los problemas.
Nuestro padre es quien siempre 
causa todos los problemas.
Notre père amène 
toujours des problèmes.
É sempre o pai quem traz os problemas.