When you start the game, you become a girl who wanders around the field to find the exit.
You may encounter many obstacles in various terrains as you pass through the city. Among them, there are dangerous traps where you can be sent back if touched just once.
At the end, you may meet the girl's friend or learn the truth about this world.
There may be challenging sections in each terrain. However, the save points can always bring you back.
As long as you don't give up the game, there is no 'game over.'