Dead Dead Demon's Dededede Destruction (デッドデッドデーモンズデデデデデストラクション), also abbreviated as DDDD, is a Japanese manga series written and illustrated by Inio Asano. It was serialized in Shogakukan's manga magazine Big Comic Spirits from April 2014 to February 2022, with its chapters collected in 12 volumes. Viz Media licensed the manga for English release in North America. The story follows two young women, initially high school seniors and later college students, struggling with the mundanity of life after an alien spaceship appears over Japan.
A two-part anime film adaptation produced by Production +h. premiered its first part in March 2024, with the second part premiering in May of the same year. An 18-episode original net animation (ONA) series edition of the films streamed worldwide on Crunchyroll from May to September 2024.
By March 2022, Dead Dead Demon's Dededede Destruction had over 3 million copies in circulation. In 2021, the manga won the 66th Shogakukan Manga Award in the general category, as well as the Excellence Award of the 25th Japan Media Arts Festival in 2022.
Plot
Three years before the events of the story, on August 31, an alien spaceship appeared over Tokyo. Although it has not attacked, the Japanese government, seeing it as a potential threat, unsuccessfully tries to destroy it. The situation leads to a cold war between the humans on Earth and the invaders in the mothership above the Tokyo skyline. There is further conflict between political groups who want to eliminate the aliens, called "warctopuses," and those who want to negotiate peace, called "peacesquids".