A novelist receives a letter from a female university student named Kubo about strange sounds that emanate from a room in her apartment. They begin to investigate incidents involving former residents, and eventually discover the shocking truths lurking inside the building.

When sixth-grader movie lover Yota finds out a girl in his class he is interested in, Asuka, will be moving soon, he decides that he wants create a movie and make her the heroine. Only one issue: he has no friends to help him. After consulting with his brother and teachers, Yota comes together with five classmates as they make use smartphones and social media to create a movie.