Mayu Misogi is a 22-year-old new teacher assigned as the sub-class teacher for class 2A. She shares a pre-existing connection with Daina Nariyuki, an English teacher at the school, stemming from their time as junior colleagues at university. Within the school environment, Mayu serves in an assistant role. She becomes caught up in the central conflict instigated by Dean Onikuma, whose scheme targets Daina and several students. This situation fosters an adversarial dynamic between Onikuma and Daina, with Mayu involved within the resulting interpersonal and professional tensions. The narrative positions her within the broader interactions and relationships among staff and students. Her depiction remains a supporting figure within the primary storyline.