Nihonjin no Shiranai Nihongo (2010)

Although my darling is a gaikokujin is a love story... both of them have foreign relationships

Both are about teachers. Both JDramas are very handy in learning keigo, Polite speech Japanese by watching..................

both are about a teacher trying to help her students, not only because of studies but also help their personal problems too

They kind of have the same concept. A teacher trying to help all her students to graduate and at the same time help them with their personal life and when a problem arise