The heroine is a little koi carp who was demoted to the human world by the Emperor of Heaven to be punished for making a mistake. The heroine has two golden fingers. One is that she can tell whether someone will be beneficial to her in the future, and the other is that the heroine is a little koi. But this koi has a bug: it prospers others, but it cannot prosper itself. Instead, he is a little unlucky guy.
Because she was demoted to the human world and punished, the heroine herself was relatively unlucky. The heroine's mother died early and she was a commoner. In addition, the heroine is dark, ugly, fat, and has a bad mouth, with a small stutter.
But also because of this, the heroine is the family's favorite. Because everyone in the family is fair-skinned, beautiful, and has sharp teeth. So they felt more pity for the heroine who had no appearance and bad words, and instead doted on the heroine even more.
