Saki adjusts to her new job over summer vacation. Taichi and Akiko notice that Yuta and Saki keep calling each other by their family names. Saki senses a change in how she feels about Yuta and wonders if she should describe it honestly in her diary.
If you're not interested, 
I guess you really wouldn't notice.
إن لم تكُن مهتمّاً، فأعتقد بأنّك لن تُلاحظ
Wenn man sich nicht dafür interessiert,
fällt einem so etwas auch nicht auf.
Si no te interesa,
es normal que no te fijaras.
Si no te interesa,
es normal que no te fijaras.
On le remarque donc pas
si on s’intéresse pas à ce domaine.
Se non ti interessa qualcosa, 
allora non te ne accorgi.
Se não tiver mesmo interesse,
acho que não ia mesmo perceber.
Если ей не интересоваться, 
то даже этого не заметишь...