1000-nen Oukoku

The prophet Nostradamus has foreseen that the world as we know it shall end in the year 1999, and the thousand-year kingdom of angels and children will commence. A young boy named Shou is at first unaware of these prophecies, enjoying a normal life with his sweetheart Alisa. However, a series of events changes his life forever, as he is entrusted with the task of saving humans by discovering the ancient continent of Atlantis.

[From Moby Games]