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.

Long summary
The chapter begins with some 3E class members attempting to assassinate Korosensei while he is out in the forest crushing ice from the North Pole for a snow cone snack. The student run towards their teacher asking if they can have a snow cone with smiles on their faces. Korosensei is so happy – whether it is at the students wanting to spend time with him or because they are following his advice on creating an assassination plan that brings a smile to their face is unclear –  that he is in tears. The students are quick to draw knives and attempt to kill their teacher who is quick to disarm the students and explain to them that their smiles looked a bit forced.

When taking the knives from the students Korosensei replaced them with flowers which are quickly discovered to be the classes flowers which they had been growing for weeks by Megu and Yada. The two girls then proceed to lecture Korosensei on how to plant the bulbs he got to replace the flowers that he picked. Maehara clarifies with Isogai that Korosensei wants to destroy the planet to which Isogai responds that he thought that but it appears that tulips aren’t included. Terasaka then points out that Korosensei is only trying to make himself look good.

Somewhere else Kayano asks Nagisa if he is doing homework. Nagisa explains that he is writing down Korosensei’s weaknesses as it might help the class in assassinating him someday. Korosensei’s first weakness is revealed to be that he messes up when he shows off.

In the principal’s office Karasuma reveals that he will be taking over as the students P.E. teacher and that he will be able to keep an eye on Korosensei while providing moral and technical support for the students. The principal of Kunugigaoka Junior High tells Karasuma that the students education and safety is his top priority.

Karasuma’s subordinate expresses how he feels that the principal is very understanding. To this Karasuma responds that the principal is being paid well to let the Ministry of Defense's operation occur. He also expresses how he can’t understand why a monster with enough power to destroy the world wants to be a teacher.

Two students walk past as Karasuma finishes telling his subordinate that only them, the principal and Class 3-E can know about Korosensei. One of the students is concerned that if their grades get any lower that they’ll be kicked into Class E. The other than explain – more so for the reader’s benefit – how terrible of a place the 3-E facility is and the students are. The student explaining all this expresses how they’d rather die than end up in that class which prompts the other to agree and resolve to study harder. From this explanation and the student’s attitudes Karasuma sees how the principal’s system works by making the “normal” students study harder and feel superior to those in class E. He acknowledges its effectiveness as well as how ideal the system is for the operation to assassinate Korosensei.

Incomplete