"Will I quit teaching before I burn out completely?" Nishiya, a dedicated teacher, strives to be kind and compassionate to his students but the endless workload, parent complaints, and fruitless attempts at guiding students are wearing him down. Despite reminding himself that teaching is his chosen path, fatigue begins to take over and at times, he forgets who he is living for. One day, amidst a series of disturbing incidents where stray cats are being killed, a rumor spreads among parents that an elusive student named Hayasaka is the culprit only attending school during exam weeks.