Entering the new millennium, the earth has entered the doomsday era due to large-scale environmental damage. In order to survive and reproduce, some people sink to the bottom of the sea and live in caves in the center of the earth; some people leave in spaceships and sail into the vast universe. Hundreds of thousands of years later, the earth became blue again, and the two branches of human descendants, the undersea people and the aliens, also met again on the beautiful surface of the earth. As soon as the two people from the stars and the sea met, they were so ugly that the other party's costumes were so different from their own... What did they experience on the bottom of the sea/on the alien planet? Unfortunately, he doesn't even have any decent clothes... So, whose clothes are not decent? What did ancient people wear?