Living in the Human World with a Girl with Animal Ears

In 5021, monsters were almost exterminated by humans, and the beast-eared girls were almost extinct as a result. The nameless protagonist takes his brain, that is, his golden finger, and travels to this brilliant era for mankind. But this doesn't make the protagonist feel any joy. Because the protagonist starts out as a dead person, smuggling into the human city with his daughter who is a beast-eared girl. In order to prevent himself and his daughter from being obliterated as a stowaway, he could only disguise and hide himself and work hard to live in the human world.