Ioto is a Japanese man who came to a distant country to study architecture.His destination is Espea, a beautiful country inhabited by many beastmen.He has no friends and in the midst of this new life that he is still not getting used to, Ioto is approached by Leo, a werewolf who works as a policeman.Finally, a friend...!Ioto is very happy, but then Leo kisses him.Ioto is confused, thinking it is a greeting from a carnivorous beastman.And then Leo hugs him again, and asks to touch him more... Ioto is passionately seduced by Leo, who tells him that he is his "Mate of him".