Nanami, a newly appointed teacher, is assigned a class plagued by serious issues such as bullying, delinquency, and school refusal. Maintaining a calm demeanor and striving to understand and support her students emotionally, Nanami remains dedicated to her role. However, a malicious presence seeks to undermine her efforts. Troubled students, their parents, school staff, and even vagrants scavenging leftover school lunches—all harboring ill will within the school grounds—continuously look for opportunities to trap and exploit her.