Amane's mother, Shihoko, arrives at the apartment without warning while Mahiru is visiting. Amane asks Mahiru to hide, but Shihoko eventually finds her, and the two neighbors frantically try to correct Shihoko's assumption that they are dating. Nonetheless, Mahiru is touched by Shihoko's motherly kindness. After Amane sees how happy Mahiru is to be called by her first name, he tries calling her "Mahiru" too. From that day on, the neighbors call each other by their first names.
You just don't see how hard she works.
أنتم لا ترون كم تُجِدُّ في الدّراسة
Nur, weil sie insgeheim vollen Einsatz gibt.
Ellas no saben lo mucho que se esfuerza.
Ellas no saben lo mucho que se esfuerza.
C’est parce qu’elle se donne
à fond.
Semplicemente non mostra 
tutto l'impegno che ci mette.
Ela apenas não mostra
o quanto ela se esforça.
Она старается, просто незаметно.