Volume 20 delivers the heartbreaking and powerful climax of the series. The final assassination attempt unfolds with emotional intensity and dignity. Every student participates, honoring the bond they built with their teacher. Nagisa steps forward to carry out the decisive act. The farewell scene is filled with gratitude, sorrow, and pride. Koro-sensei’s final lesson becomes unforgettable. The emotional payoff is both devastating and beautiful. Themes of growth, mentorship, and sacrifice reach their peak. Readers witness how much Class 3-E has matured. Volume 20 stands as one of the most emotional conclusions in modern manga.