Natsuki's life experiences a big shift after becoming a teacher and starting a salvaging service. Rumors of a school lit with electricity attracts new students, and activities around the school regain a sense of liveliness. 
I learned a new thing.
تعلّمتُ شيئاً جديداً
Ich verstehe.
Aprendí algo nuevo.
He aprendido algo nuevo.
Je le garde en mémoire.
Ho imparato una cosa nuova.
Acabo de aprender algo novo.
Буду знать.