Dokidoki! Precure: Mana Kekkon!!? Mirai ni Tsunagu Kibou no Dress

Mana is given a wedding dress which was worn by her mother and grandmother.
All of sudden a mysterious man named Matthew appears and takes her to the past world.
Mana is so glad to meet her grandmother and her beloved dog Maro that she had a long time ago, but she can't find two of her bes....