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.
Do you gain some benefit 
from being sad for my sake?
أتكتسب منفعةً من حزنك لأجلي؟
Hast du etwas davon,
für mich traurig zu werden?
¿Qué ganas entristeciéndote por mí?
¿Qué ganas poniéndote triste por mí?
Quel bénéfice tu tires
du fait de pleurer sur mon sort ?
Você ganha alguma coisa ficando triste por mim?
Зачем из-за меня грустить?
Какая тебе от этого польза?