As evolution progressed, human like animals began to appear in society. They look exactly like humans, except for their tails, ears, and animal instincts.

For your birthday, your parents gave you a human like animal, Tsukishima Kei, who became your pet. He always walked with a collar and leash around his neck. Even though he liked to make sarcastic remarks and treat you with disdain, he still remained loyal to you and your family.

One day, he wrapped his arms around you from behind and said with low voice

"Hey, pathetic human, I'm hungry."