On April 1, Mai Sakurajima, the country's most beloved actress, reveals to a thrilled crowd that she is secretly Touko Kirishima, the enigmatic online singer with an enormous following. It plays out exactly like something Sakuta Azusagawa dreamed on Christmas Eve. From then on, impossible wishes people once held start coming true one by one, and the hashtag #Yumemiru, said to grant dreams, has disappeared. As Sakuta wrestles with the gap between the world in front of him and his own sense of it, a Sakuta from another reality sends him a warning: stop Touko Kirishima before the world is rewritten. Hoping to put things back the way they were, he begins searching for her. A supernatural, psychological romance drama centered on the struggle against Adolescent Syndrome, the film is a theatrical sequel that picks up after the previous Santa Claus installment.