Losing her tail was not the only thing Erina was required to sacrifice when she failed to protect one of her kind from being captured by the humans. She also had to leave her home, the ocean, and find the humans responsible for capturing her fellow mermaids. When Duke Malford, her unexpected mate, offers to help her, Erina has no choice but to accept. She thought she could easily finish her mission with his aid, but instead, he imprisons her in his home and treats her as a plaything to entertain himself. Due to their bond, Erina can’t help but forgive him. However, she discovers that Duke is hiding many things from her that may even lead to her ruin…