On their wedding day, she and the prince had an adventure at the same time - on the seventh day of every lunar month, the two would exchange souls. He is the cold-faced prince, and she is a clumsy hostage, forced to spend the most vulnerable day of each month in the other's body. She blocked the harem's poisoned wine for him, and he washed the assassination scene with blood for her. Until she was assassinated after an exchange, he used his own body to block the fatal sword for her, and chuckled before falling into coma: "If you die, who will play this exchange game with me?"
