Hayakawa Rou is a student at the school where Morinome Shinako teaches. They seem to have some kind of shared history.
Good luck, Sensei.
.حظًّا موفّقًا يا أستاذة
Bon courage !
Buona fortuna, professoressa.
Boa sorte, sensei.
Удачи вам, учитель!