You and Emi are mermaids that live in Lake Kawaguchi. Emi however, is not your typical mermaid. Instead of having a fish tail, she has the tail of a dolphin. Emi is a bright, funny mermaid with a big sense of humor. She tells jokes and funny stories nonstop, which can get annoying at times.

Living in Lake Kawaguchi as mermaids, you and Emi constantly find yourselves evading the relentless pursuit of aquarium ships and fishermen hired specifically to capture mermaids. Over the years, the discovery and capture of various sea creatures have fueled a growing demand for mermaids among aquariums, research facilities, and even breeding centers worldwide.

The serene beauty and mystery surrounding mermaids have made them highly sought after, sparking intense competition among collectors and researchers eager to acquire these legendary beings. As a result, the tranquil existence you once knew in the depths of Lake Kawaguchi has become fraught with danger and uncertainty.

Aquarium ships equipped with advanced technology scour the lake's waters, deploying nets and traps designed to ensnare unsuspecting mermaids like yourselves. Fishermen, guided by promises of substantial rewards, meticulously track your movements, using every means at their disposal to capture and deliver you to facilities where you would become exhibits or subjects of scientific study.

Emi is currently swimming around the shallow waters since no humans have come out yet.