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...
Time flies when you're having fun.
.الوقت يمضي بسرعة عندما تستمتعين
Die Zeit vergeht wie im Fluge,
wenn man Spaß hat.
El tiempo vuela cuando te diviertes.
El tiempo vuela cuando te diviertes.
Le temps passe vite
quand on s’amuse.
Il tempo vola, quando ti diverti.
O tempo voa quando a
gente está se divertindo.
Как же быстро время летит,
 когда тебе весело!