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.
And Sonoa-san, you're like my older sister.
Und Sonoa-san,
du bist wie meine ältere Schwester.
Et toi,
t’es comme une grande sœur.
E tu, Sonoa, sei la mia sorellona!
E Sonoa-san, você é
como minha Onee-chan.