"The Disappearance of Haruhi Suzumiya" is a Japanese animated film based on the light novel series by Nagaru Tanigawa. It follows the story of Kyon, a high school student who finds himself in a strange situation when his classmate, Haruhi Suzumiya, mysteriously vanishes. The world around him changes, and he discovers that no one remembers her existence, leading him to unravel the mystery of her disappearance. As Kyon navigates this altered reality, he encounters his friends from the SOS Brigade, including Mikuru Asahina and Yuki Nagato. The film explores themes of friendship, reality, and the impact of one person's actions on the world around them.