[Machine Translation] Even though she knows that "it will be easier if you just give up," loneliness is hard to bear. There is a legend that mermaids live in the town where a girl who was abandoned by her mother moved to. Not wanting to admit that she was abandoned, the girl stubbornly refuses to blend in with her surroundings, until she meets a mysterious girl named "Sennen-san. Is she a good thing or...? This is a tale of a horrifyingly beautiful (mermaid) and a girl (girl).