Monsters were raging on the earth, and humans built the "City in the Sky." Leaving the land where monsters were rampant, humans seemed to have reached the end of the road. Fortunately, they never gave up and finally regained a piece of land of their own. Humans build "high walls" and monsters no longer invade...
The flower of hope blooming in despair guides people's way back...
He comes from the past and goes to the future. Whether he will be reborn or destroyed, no one knows...
Under time, fate is singing, mourning, and silent...
Purpose: To fulfill my high school fantasy...