Assassination Classroom Wiki
Time to say Thank you
Volume 21
Vol 21 (final cover)
Volume Information
Kanji ありがとうの時間
Romaji Arigatō no jikan
Pages 208
Cover Emotion Happy (The Stargazed Moon)
Japanese July 4, 2016
English April 3, 2018
178. Time for Tears
179. Time Passes
180. Time to Kill
Extra 1. Time to Come Home
Extra 2. Time to Go to the Izakaya
Extra 3. Identity Time
Extra 4. Time to say Thank you
Extra 5. Tokyo Department Store War Journal (One-Shot)
Volume Guide
Time to Graduate
N/A →

Time to say Thank you (ありがとうの時間 Arigatō no Jikan) is the final volume of the Assassination Classroom manga.


Ever caught yourself screaming, "I could just kill that teacher"? What would it take to justify such antisocial behavior and weeks of detention? Especially if he's the best teacher you've ever had? Giving you an "F" on a quiz? Mispronouncing your name during roll call...again? How about blowing up the moon and threatening to do the same to Mother Earth—unless you take him out first?! Plus a reward of a cool 100 million from the Ministry of Defense! Okay, now that you're committed... How are you going to pull this off? What does your pathetic class of misfits have in their arsenal to combat Teach's alien technology, bizarre powers and...tentacles?

Publisher's Summary[]

In the aftermath of tragedy, the students of 3-E nevertheless march proudly in their graduation ceremony. Will their futures still unfold as planned? And what will they do with their reward money…? Then, enjoy a long side story revealing what Koro Sensei was really up to over winter break! Can Koro Sensei truly make a friend and ally out of anyone…?! Plus, a bonus short story with all-new characters, set in a dystopian future.


Chapter 178: Time for Tears[]

Main article: Chapter 178

Chapter 179: Time Passes[]

Main article: Chapter 180

Chapter 180: Time to Kill[]

Main article: Chapter 180

Extra 1: Time to Come Home[]

Main article: Extra Chapter 1

Extra 2: Time to Go to the Izakaya[]

Main article: Extra Chapter 2

Extra 3: Time to Reveal Identities[]

Main article: Extra Chapter 3

Extra 4: Time to say Thank you[]

Main article: Extra Chapter 4)

Extra 5: Tokyo Department Store War Jounral[]

Main article: Extra Chapter 5

Author's Comment[]


  • This volume has the most pages in it out of all the volumes by far.


e - d - vAssassination Classroom Volumes
Volume 1Volume 2Volume 3Volume 4Volume 5Volume 6Volume 7Volume 8Volume 9Volume 10Volume 11Volume 11Volume 12Volume 13Volume 14Volume 15Volume 16Volume 17Volume 18Volume 19Volume 20Volume 21
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