Ep. 22: The Tropical Club searches for a mermaid's treasure in a cave guarded by Yaraneeda.

During a camp, the Witch creates an orb to summon a Yaraneeda, which Butler reports to Numeri. The five girls visit Manatsu's secret beach and consult Tomi, who mentions a forest mermaid hiding treasure in an island cave. The group enters the cave but splits up after encountering Numeri. The remaining four girls face Numeri, who summons a Zettai Yaraneeda, prompting them to transform and fight. Meanwhile, Laura discovers the Perfume Shiny Brace, which transforms into the Perfume Shiny Ring. She transforms to join the battle, enabling La Mer to use Ocean Bubble Shower to defeat the monster. As the caves flood, Tomi sees Laura and mistakes her for the mermaid. That night, the girls discuss events while Butler reveals details about a cup in the caves to Numeri and Elda.

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