"Eiga Delicious Party♡Precure Yume Miru ♡ Okosama Lunch" is a film adaptation within the "Pretty Cure" franchise, specifically tied to the "Delicious Party♡Precure" series. The story centers on the main protagonists of "Delicious Party♡Precure," who are tasked with protecting the balance of the culinary world. The narrative begins when the Cures—Yui Nagomi, Kokone Fuwa, Ran Hanamichi, and Amane Kasai—encounter a mysterious child named Kome-Kome, who claims to be the "Okosama Lunch" spirit. Kome-Kome seeks their help to save the world of dreams, which is under threat from a new antagonist seeking to disrupt the harmony between dreams and reality.

The plot unfolds as the Cures and Kome-Kome journey into the Dream World, a fantastical realm where dreams take physical form. Here, they discover that the antagonist is exploiting the dreams of children, turning them into negative energy to fuel their own power. The Cures must navigate this surreal landscape, confronting challenges that test their teamwork and resolve. Along the way, they encounter various dream manifestations, including whimsical creatures and distorted versions of familiar elements from their own lives, which serve as both obstacles and opportunities for growth.

As the story progresses, the Cures learn more about Kome-Kome's origins and the significance of the Dream World. They uncover a deeper connection between dreams and the culinary world, emphasizing themes of creativity, hope, and the importance of nurturing one's aspirations. The climax involves a decisive battle against the antagonist, where the Cures must harness the power of their dreams and the bonds they share to restore balance. The resolution highlights the enduring strength of friendship and the transformative power of believing in one's dreams.

The film retains the core themes of the "Pretty Cure" series, blending action, fantasy, and heartfelt moments. It expands on the established lore of "Delicious Party♡Precure" while introducing new elements that enrich the narrative. The characters' development is consistent with their portrayals in the main series, with each Cure contributing their unique strengths to overcome the challenges they face. The story is accessible to both longtime fans and newcomers, offering a self-contained adventure that complements the broader "Pretty Cure" universe.