A “Beastman” who coexists with humans - a rare being who can be both a beast and a human. Hiiragi, a bookstore employee, has a boyfriend named Soshi who is a rare species of “black panther beastman” and is a popular model all over the world. There are days when he wonder why he is his average lover. One day, Hiiragi is marked by his guest, an Afghan hound beast. That night, Soushi, who noticed that he smelled something other than his own, falsely suspected him, and although he hastily defended himself, Soshi's possessiveness ran wild and he attacked him as a black panther...!?