[Machine Translation] A teahouse called "Yoko Yaka ( ) Iori" stands quietly in a certain part of Tokyo. Iori Senzoku, the owner of the teahouse, is a stunningly beautiful woman, but she also has a very bigoted tongue. Iori has the ability to distinguish between "humans" and "yokai," and early in the New Year, a new detective from the Tokyo Metropolitan Police Department, Wakisaka, arrives on the scene. A woman who is registered as a "mermaid" has been kidnapped. Mermaid meat is a miracle drug for longevity. When past and present incidents involving mermaids intersect, the shadow of that man looms... The third volume of this popular work, newly written for the library!