: Kaede Kayano reveals her true identity and the fact that she has had tentacles all along.

The 15th episode of (Ansatsu Kyoushitsu) varies depending on which season you are referring to. The English dub is available on platforms like Hulu, Netflix , and Apple TV . Season 1, Episode 15: "End-of-Term Time"

: Gakushu Asano, the Principal's son, attempts to investigate the rumors surrounding Class E's mysterious teacher. Season 2, Episode 15: "Confession Time"

: After a "tense and terrifying encounter" with a student who has personal reasons to kill him, Koro-sensei is forced into a corner.

: 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.