As a wise fish, Hongjin's biggest ideal every day is not to be eaten by others, but she doesn't know that there are always people behind her who are thinking about her and want to eat her. The unpopular third son of the Mu family always covets a koi in a blue and white porcelain tank in a deserted corner, and smiles gloomily behind his back, "Don't scare my fish." (The male protagonist is slightly sick, but the female protagonist is cute)