Chapter 52

The Ace's Time (エースの時間, Ēsu no jikan) is chapter 52 of the Assassination Classroom manga.

Short summary
Asano prepares the 50 commands for E class in case they loses, one of which forces E class's members to reveal their secrets (about Korosensei). Meanwhile, Korosensei encourages his students to study harder for the tests with his tentacles as prizes. The headmaster ensures that the tests will be hardest that possible.

Finally, it's time for them to step into the battlefields of the last term's tests.