Hanabi catches a cold, but both Iori and Konomi have to go to school, so Sonoa is left to take care of Hanabi. But Sonoa has some quirks to her personality, and things don't quite turn out as expected when she tries to take care of Hanabi.
I'm an only child, so I 
really think family is great.
Ich bin ein Einzelkind,
Familie halte ich für was Schönes.
Aunque no tengo hermanos,
amo a mi familia.
Aunque no tengo hermanos,
quiero a mi familia.
En plus, je suis fille unique,
alors on est proches.
Io sono figlia unica, 
quindi la famiglia per me è importante.
Sou filha única, então realmente
penso que família é demais.