Assassination Classroom (暗殺教室, Ansatsu Kyōshitsu) is a Japanese action-comedy manga and anime by Yūsei Matsui that debuted in 20123. The story follows a class of underperforming middle schoolers tasked with killing their yellow, tentacled teacher Koro-sensei before he destroys the planet at the end of the school year. The premise mixes slapstick, weapons training, and heartfelt classroom drama, which set the series apart from typical shōnen fare.

The manga sold well enough to place as the 7th top-selling series in Japan during 2013 per AnimeNewsNetwork2. The 2015 anime adaptation holds an 8.1/10 rating from roughly 30,000 voters on MyAnimeList1 and an 8.2/10 on IMDb4. English-speaking fans built a large community around the show on Tumblr5 and FanFiction.net6, where hundreds of fan works about Koro-sensei and Class 3-E piled up.