Volume 15 intensifies the countdown toward the final decision that will determine Earth’s fate. Class 3-E stands united but emotionally divided about what must be done. Government forces close in, raising the stakes dramatically. Strategic battles combine with heartfelt conversations. Nagisa’s leadership qualities become more evident. The students reflect on how much they have grown under Koro-sensei’s guidance. Emotional scenes feel raw and genuine. Humor still appears, but it carries a bittersweet tone. Every assassination attempt now feels final and meaningful. Volume 15 marks the beginning of the series’ most dramatic and unforgettable arc.