Assassination Classroom is a Japanese film, released in 2015. It is an adaptation of the manga Assassination Classroom.
The earth is facing the danger of being an octopus-like, yellow creature with superhuman strength and has destroyed 70% of the moon, turning the moon into a crescent moon shape forever. That creature claims that in March of the following year, the Earth will be destroyed by him like the moon, but he has given humanity a chance to change fate. He offered to be a teacher of Kunugigaoka Middle School's worst class, class 3-E (3rd year class E), and would teach those students not only ordinary subjects, but also the art of assassination. The Japanese government agreed (because he could not kill him and also because when he was studying, the students could kill him within close range) and offered a price of 10 billion yen for the student who killed the creature. This and "Assassination class" is started. However, this quest soon became impossible, because that creature not only had supernatural abilities like Mach 20, but was also the best teacher 3-E had ever had.
On March 14, 2015, the Moon was 70% destroyed. A strange creature threatens to inflict the same fate on Earth in March 2016. Almost invulnerable, it moves at Mach 20 and has tentacles. Before carrying out his threat, he makes an offer to the Japanese government. He becomes a teacher of class 3-E, the class of dunces of Kunugigaoka college, to which he must teach to become assassins. The Japanese government offers a ten billion yen reward to whoever kills this creature, and brings professional killers into the classroom.
Ryosuke Yamada: Nagisa Shiota
Masaki Suda: Karma Akabane
Maika Yamamoto: Kaede Kayano
Kazunari Ninomiya: Koro-sensei
Okuma Anmi: Kirara Hazama
Wakana Aoi: Ayaka Saitou
Shôta Arai: Masayoshi Kimura
Tanaka Nichinan Ayano: Hayami Rinka