Nishikata is studying hard for the test for the sake of his video games when Takagi-san enters the library.
Takagi-san teaches him how to solve a math problem, but Nishikata can稚 help but think she痴 up to no good...
I'm serious. Seriously, don't tell anyone.
.أنا جادّ. لا تخبري أحدًا بحقّ
Ich mein’s ernst.
Niemand darf davon erfahren!
En serio. No le cuentes a nadie.
En serio. No se lo digas a nadie.
Tu le répéteras vraiment pas ?
Io dicevo sul serio. 
Nel senso, davvero non dirlo a nessuno.
É sério. Não conte pra ninguém!
Я тебя очень прошу, не рассказывай!