This volume begins with the addition of a new English teacher, Irina Jelavich, who is secretly a professional assassin.
She tries to kill Koro Sensei but, like an idiot, doesn't follow instructions and uses real bullets. Her efforts fail, and she basically has to beg the students to let her continue on as their teacher.
Then we meet the students' next enemy, the diabolical Principal Gakuho Asano, who designed the school's Class 3-E system and who wants to keep them in their place.
He sets them up to fail their midterms.
Then it's time for a school trip to Kyoto, where the students are supposed to lure Koro Sensei to prime spots for snipers to shoot him.
Unfortunately, several girls from the class are kidnapped.
I was not fond, at all, of the addition of Irina, aka Ms. Fan Service. She constantly hung off of and kissed Nagisa, a junior high student, because he had the best info on Koro Sensei and could therefore be useful to her (and yet
she didn't listen when she was told that Koro Sensei could only be killed by special bullets and knives?). Also, her "defeat" by Koro Sensei looked like an allusion to tentacle rape.
I liked this volume more when it focused on Koro Sensei again. I loved the detail about Koro Sensei creating customized tests for each student, based on their strengths and weaknesses. It seems like Matsui is already starting to forget the series' original goal, though. When the school trip came up, the only real reference to assassinating Koro Sensei was the thing about picking prime spots for snipers to get him. They probably could have gotten a good assassination attempt in while Koro Sensei was still suffering from car sickness, but they didn't even try.
This volume ended with a 6-page crossover manga that pitted Assassination Classroom's Koro Sensei against the main character of The Mishaps of Kusuo Saiki (The Disastrous Life of Saiki K.). It was okay, I guess, but I haven't read or watched the other series.
(Original review posted on A Library Girl's Familiar Diversions.)