: Koro-sensei makes a deal with the students: if anyone in Class 3-E places first in any subject, they gain the right to destroy one of his tentacles, making him easier to assassinate.
Watch the intense 'Confession Time' from Season 2, Episode 15 here: Ansatsu Kyoushitsu (TV) (Dub) Episode 15
This episode is a major turning point in the series, focusing on a massive revelation regarding one of the students. : Koro-sensei makes a deal with the students: