Marrying the Blackhearted Prince as His Medicine

[An irresistibly gorgeous, fiery heroine; a scheming male lead; very sweet, devoted 1v1 romance] Xiao Fuyi, heir to an ancient family of mystical doctors, is a master of both medicine and poison. Then she transmigrates and marries a scheming black-hearted man. They agreed that all she had to do was keep him alive with her blood. But what happens? He keeps ruining her plans! She goes to see her cousin, the Third Prince... Prince Yan bites his lip until it bleeds. “Tell the Princess Consort I'm vomiting blood!” She spars with the young master of Kunwu... Prince Yan grabs someone else's hand and punches himself. “Tell the Princess Consort I've gotten into a fight!” She discusses Buddhist teachings with the Buddha's disciple from Qilian... Prince Yan tries to remove the seal inside him. “Tell the Princess Consort I've gone mad from cultivation...” Xiao Fuyi's ominous voice comes from behind him. “Go ahead. Make a move and see what happens!” Yan Zhaoxi pulls her into his arms. “Be good, and I won't move.”