Kuroha's younger sisters abruptly visit Sueharu's house to tell him that she has developed amnesia. All her memories from summer break onward are gone, and they stop right when she was about to confess to Sueharu. So she suggests starting over from the moment of her own confession and erasing everything she did during the cultural festival. But Kuroha's behavior is making Shirokusa suspicious...
If we start over with the first buttonhole, 
we won't have any more problems.
.إن بدأنا بشكل صائب، فلن نواجه أيّ مشاكل أخرى
Wenn wir schön der Reihe nach beim ersten Knopf
anfangen, sollte es keine Probleme mehr geben.
Si partimos de nuevo con el pie derecho,
no habrá ningún problema.
Si empezamos bien de nuevo,
no habrá ningún problema.
Si on s’y reprend correctement,
Se iniziamo dal bottone giusto, 
non avremo altri problemi.
Se começarmos de novo com o primeiro
botão, não teremos mais problemas.
Если начнём с первой, тогда все 
проблемы наверняка исчезнут.