"Tropical-Rouge! Precure Petit Tobikome! Collabo▽Dance Party!" is a short anime special that ties into the larger "Tropical-Rouge! Precure" series, focusing on the magical girl team known as the Precure. The story centers on Manatsu Natsuumi, Sango Suzumura, Minori Ichinose, Asuka Takizawa, and Laura, who transform into the Tropical-Rouge Precure to protect the world from evil forces. In this special, the group is invited to a lively dance party hosted by the fairies of the Mermaid Kingdom. The event is intended to strengthen the bonds between humans and merfolk through music and dance.

The narrative unfolds as the Precure team prepares for the party, showcasing their camaraderie and individual personalities. Manatsu, the enthusiastic and optimistic leader, is excited about the event, while Sango, the fashion-conscious member, helps everyone choose their outfits. Minori, the studious and thoughtful member, ensures everything is organized, and Asuka, the athletic and determined member, brings energy to the preparations. Laura, the mermaid princess, acts as a bridge between the human and merfolk worlds, emphasizing the theme of unity.

As the party begins, the Precure team and their fairy friends engage in joyful dancing, highlighting the vibrant and colorful atmosphere of the event. However, the festivities are interrupted by the appearance of a minor antagonist, who seeks to disrupt the harmony between humans and merfolk. The Precure quickly transform and confront the threat, using their magical abilities to protect the party and restore peace. The conflict is resolved through teamwork and the power of friendship, reinforcing the core themes of the series.

The special concludes with the successful continuation of the dance party, celebrating the unity and cooperation between the two worlds. The Precure team reflects on their mission to protect both humans and merfolk, emphasizing their commitment to spreading joy and positivity. The story serves as a lighthearted addition to the "Tropical-Rouge! Precure" series, offering fans a fun and engaging side story that complements the main narrative.