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.
That's right. Both Hiura-kun 
and Matsui-kun are gone.
صحيح، اختفى هيورا-كن وماتسوي-كن
Stimmt, Hiura-kun und Matsui-kun
sind ja gar nicht hier.
Sí, es verdad,
Hiura y Matsui desaparecieron.
Sí, es verdad,
Hiura y Matsui desaparecieron.
En effet,
ni Hiura ni Matsui ne sont là.
Giusto, giusto, non ci sono né Hiura, né Matsui.
Isso mesmo. Hiura e Matsui sumiram.
Да, Хиура с Мацуи
и впрямь куда-то пропали.