Dokidoki! Precure Movie: Mana Kekkon!!? Mirai ni Tsunagu Kibou no Dress
A masked man wielding a mysterious clarinet, constructs a fortress in the sky and begins abducting people. This man, who proclaims himself to be the Land of Memories' king Marsh, confronts Mana and the Precure, accusing them of forgetting their memories of the items they've thrown away. He then traps the Precure into films of their memories as revenge.