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. 
Oh, the equation from the other day?
تقصدين تلك المُعادلة؟
Ach ja? Geht es um
die Formel von neulich?
¿Es sobre la fórmula aquella?
¿Es sobre la fórmula aquella?
Non. C’est au sujet
de cet exercice, hein ?
Ah, la formula dell'altro giorno, giusto?
Ah, é sobre aquela equação
do outro dia, né?
А, ты про то уравнение?