Chapter 3

Service Time (サービスの時間, Sābisu no jikan) is chapter 3 of the Assassination Classroom manga.

Short summary
A group of students spot Korosensei and pretend to befriend him before taking out their knives to attack him. Korosensei replaces their knives with flowers from the class garden by accident and promises to help them grow new ones. Nagisa starts to document Korosensei's weaknesses on a notepad. Meanwhile, Karasuma requests to become Kunugigaoka Junior High School's P.E. instructor. Upon entering the school hallways, he notices a sense of discrimination between class 3-E and the rest of the school. He then finds class 3-E outside with Korosensei hanging off a tree branch to apologize for destroying the flowerbed. The students nearly kill Korosensei when the branch breaks, but Korosensei manages to escape. Meanwhile, a previously suspended student is briefed over the situation in class 3-E before he is to return to that class.