"Tsukiuta." Gekijouban: Rabbits Kingdom the Movie

On a winter day, Hajime Mutsuki, leader of the idol group "Six Gravity," visits a secondhand bookstore and meets Shun Shimotsuki, head of the related unit "Procellarum." They come across an old book believed to be the original script for a play they are set to perform: "Rabbits Kingdom." Though Hajime claims to have never heard the title before, he feels an odd sense of familiarity. Shun responds with a knowing smile, calling it a nostalgic tale from "another world." The story explores an alternate version of a kingdom.