The first midterms of the school year are upon them. Once the top scoring student in the school's entrance exam and now a talented student at the top of her year, Yume is anxious to defend her position as a model student. She is displeased, however, to discover Mizuto’s relaxed approach to studying. The two later butt heads again, over something Mizuto did during their Japanese exam. Yume berates Mizuto for his actions while Mizuto retaliates in kind.
I think you meant big sister, 
my dear little brother.
"أعتقد أنّك قصدت "أختي الكبيرة
.يا أخي الصّغير
Ich glaube, du meintest große Schwester,
mein kleiner Stiefbruder.
Dirás "hermana mayor", hermanito.
Dirás "hermana mayor", hermanito.
Credo volessi dire "sorellona", 
mio caro fratellino.
Eu já disse que sou a irmã
mais velha, irmãozinho.
Ты хотел сказать,
что я старшая, братец.