Synopsis

It was one day in late February, with the entrance exams over and graduation just around the corner. Amid the government's increasingly strict surveillance, the students of Class 3-E looked back on their year with Korosensei.
Memories resurfaced — the fading doodles they drew on Professor Bitch, the special swimming lessons, the clashes with the students of Class A, and Valentine's chocolates. The classroom bustled with nostalgic conversations.
Meanwhile, during winter break, Korosensei was targeted by a group of four assassins, but as always, he easily dodged their attacks. Later, when he visited the izakaya they frequented to tease them, he ended up saving the blind owner, Azusa, who was burdened with debt, and her daughter Hotaru, from a certain incident.
Through this encounter, Korosensei once again strengthened his resolve: to accept his fate, yet fulfill his duty as a teacher with all his might until the very end.
Another day began as usual. The students of Class 3-E continued their attempts to assassinate Korosensei before the school year ended, while Korosensei, with a smile, deflected their attacks and praised their growth.
And in the ending, the "graduation album" —Korosensei's final task— reveals a glimpse of their future, leading into the series finale.