The anime is like this: There is a girl and she has friends (kids and mostly boys). Then her only memory is a floating island with many moons. Then they discovered that the girl is the princess of some sort of planet or whatever, and she was reincarnated, and when she was reincarnated, she has no memory of her previous life. Her only memory is that floating island with many moons. That is why she always paints it or draw it.