Hey, you beautiful people. The teacher-student relationship in Japan is one of the few things you don't want to see in your life. The teacher would get reprimed by the system and would not be able to find a job as an educator in any place. Just the fact that she omitted that Yamato and she are in a relationship while he was working under her as an assistant teacher would be punishable. Generally, teacher couples are prohibited from lecturing in the same school or prefecture.