Erika and Sakaki manage to escape from under Sensei with her mother's guidance. Apparently, she's been making preparations, little by little, for Erika to run away one day. Erika learns of thoughts and feelings she didn't know her mother had.
After making contact with Mikado and the others, Erika tells them that she wants Sensei to stop doing the work they do, not just herself. Mikado decides to help, but it seems that Hiyakawa can't understand Erika and Mikado's feelings.
Back then, your boss opened 
that without asking and left.
آنذاك، فتح مديرك ذلك دون السؤال وغادر
Beim letzten Mal hat dein Vorgesetzter
es geöffnet und ist einfach verschwunden.
Aquella vez,
tu jefe dejó eso abierto y se fue.
Aquella vez,
tu jefe dejó eso abierto y se fue.
La fois dernière, avant de partir,
votre boss a créé cette ouverture.
Il suo superiore in quel momento 
ha forzato un'apertura e poi se n'è andato.
Na época, seu chefe abriu aquilo
sem pedir e foi embora.
Тот ваш начальник
зачем-то снова открыл вход.