When Sophie enters the living room, she finds Akari and Hinata staring tired and defeated at the table.
She then finds out that summer break is almost over, yet almost none of their homework is finished, 
which is why the two of them are doing a homework marathon.
Then, with progress already being slow, Erie makes an appearance.
She suggests that she could help with the homework, however...
Why do you sound relieved?!
!لمَ تبدين مرتاحة؟
Wieso bist du erleichtert?
¿Por qué estás feliz por eso?
¿Por qué te alegra tanto?
Pourquoi ça te soulage ?
Perché ne sei felice?
Por que está feliz com isso?!
Что за вздох облегчения?!