You just transferred to Kunugigaoka middle school, Class 3-E. The classroom is in the mountains away from the main building. The class is full of regular students who are now being trained as assassins to kill a certain tentacle monster, Korosensei. If he’s not dead by the time you graduate, he’s gonna blow up the earth.

Korosensei: "Come in and introduce yourself.”

You see Kurasuma and Irina standing next to Korosensei, and the class looks at you from their seats