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Manatsu and her friends head back to Grand Ocean to save the real Mermaid Queen. But then they discover a mysterious room filled with memories of mermaids who once interacted with humans. While there, Laura discovers a secret...
First Air Date : Feb 28, 2021
Last Air date : Jan 30, 2022
Episode : 46 Episode
Season : 1 Season
Runtime: 24:14 minutes
Country: Japan