Muru, a young woman with romantic ideals who lives in the village of Mitten, is telling stories to local fishermen about the village's mermaid legends when there is a pile-up at the local drawbridge which involves Lupin's car. While Lupin recovers from whiplash and waits for the bridge to be repaired, Muru is captivated by the beauty of Fujiko, who she thinks looks like a mermaid, and follows her and the rest of Lupin's gang, concocting romantic tales in her mind as she observes them, imagining that the three men are all Fujiko's suitors...