Not your typical middle school nurse, Hadesu Sensei is often thought of by students as a shinigami due to his unsettling appearance. However, his amicable nature and desire to forge a bond with his students manages to soften his dark demeanor. Moreover, Hadesu Sensei possesses unmatched proficiency in casting out "byouma" – evil spirits of illness that can infest and afflict pupils within the school.