Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
During World War II, an Allied Fleet tanker was submerged in a U-boat, but the ship was still viable, and the five men and women who survived started life trapped in the sea, while there was a huge immigrant fleet of far-interstellar aliens who wanted to be a habitable planet for more than a dozen generations under frozen sleep. It is a full-scale sci-fi story in which two stories are told alternately.