Nene, a succubus, was living her quiet, modest life in the demon realm -- until one day, she was suddenly ordered by her older sister to carry out a marriage scam. Her sister's goal is to obtain a piece of extremely rare rainbow jade that can only be mined in a tiny region of the human realm. And apparently, this jade rarely reaches the market, as it is monopolized by the local ruling clan. However, there's an interesting rumor: That clan has the custom of gifting a piece of rainbow jade to their partner when they get married. So, the plan is to have Nene approach a man from that clan, pretend she wants to marry him, and swindle the rainbow jade from him. After warning Nene that if she fails, she will be sent on a matchmaking date with a demon she can't stand, her sister shoved her into the human realm. Nene immediately found herself in a life-or-death situation after landing, only to be rescued by her target, Kurt. Nene is determined to carry out her marriage scam, retrieve Kurt's rainbow jade, and avoid the matchmaking date. However...