She was originally the demon king feared by everyone in the universe, but when she woke up, she became a three-year-old human on earth.
At the beginning, she lost all her magic and was bullied in the human world. However, as the demon king who causes trouble in the universe, he can still dominate one area (community) even if he loses his magic.
As she slowly adjusts to the human world, her magic slowly returns. When he was about to continue his former demon king's feats, he unexpectedly discovered that he was not the only one in this world, but there were also many people who had also traveled through time...
Purpose: Even if you are a demon king, you must abide by the rules of the earth