She, an ordinary student, suddenly became the princess of the dark world. This sudden change really made her not know what to do, so she had to find her "omnipotent" friend to help with the move. Unexpectedly, she accidentally dragged her friend into the "water". . . . .
He is a prince in the heaven. He came to the human world in order to find the princess in the dark world. Unexpectedly, when he brought the princess back to the dark world, he found that his heart, which had been sealed for three hundred years, had fallen. . . . . .
He is the king of the dark world. Because of the war between the three realms three hundred years ago, he has become a big figure admired by everyone in the alien space. But even such a person cannot escape love. . . . .