About World’s End Harem Manga:
In the year 2040, Japan has advanced technologically to the point of no longer needing people to work. However the cure for some diseases, such as multiple sclerosis, has not been discovered?
People who have this disease have to stay cryogenized for 5 years to receive the cure. What was not expected when they woke up, was that they are the only hope for humanity to survive.