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

Synopsis

Mana is given a wedding dress which was worn by her mother and grandmother.<br> All of sudden a mysterious man named Matthew appears and takes her to the past world.<br> 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 best friends Rikka and Alice. It looks her precious memories have been changed somehow.<br> If things continue as is, the future will be ruined, too.<br> The Precure girls have to fight to protect their memories and future!!<br><br> (Source: Crunchyroll)