Kokubu

A male teacher who serves as the head of the academic year becomes the temporary homeroom teacher for Hinata Kawamoto's class after their original teacher (voiced by Sayaka Ohara; in the movie version, the character is named Aoyama and played by Nahoko Yoshimoto) is hospitalized due to stress. He delves deeply into the bullying issues in the class and manages to restore a certain level of peace. Even after this, he continues to provide guidance in pursuit of a fundamental resolution. Later, the role of homeroom teacher for Hinata Kawamoto's class is handed over to a male teacher named Komigawa (voiced by Yoshimitsu Shimoyama).