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.
It's a pain to have 
to go to the door every time.
من المزعج الاضّطرار لفتح الباب في كلّ مرّة
Ich habe sowieso keine Lust,
jedes Mal zur Tür zu latschen.
È una rottura dover venire
ad aprire la porta ogni volta.
É um saco ter que ir abrir
a porta todas as vezes.
Мне лень открывать тебе каждый раз.