In the clip, the scene from the film, which captures a moment in the lives of Kosuke, Natsume, and the other children on a drifting apartment complex, is shown for the first time.
Zutto Mayonaka de Iinoni / ZUTOMAYO also provides the film’s theme song, “Kiete Shimaisou desu” (I am going to disappear), as their first anime theme song work.
As the apartment complex drifts in a mysterious sea with Kosuke and the others on board, they band together to try and survive.