"Lim Sohee is the envy of all. As the youngest professor at Jaelim University and the fiancée of the heir to the global pharmaceutical giant Venon, she is also a stunning royal omega. Her future seemed perfectly set as she prepared for her upcoming wedding. But during a secluded trip with her fiancé, an unexpected heat cycle hits. For three days and nights, Sohee is consumed by primal instincts, unaware of the passing time. When she finally comes to her senses and turns on her phone, she is met with over a hundred missed calls from her fiancé. Confused, she realizes something has gone terribly wrong. Wait, if her fiancé is the man lying in bed next to her... why would he have called her so many times? Who is he really? “Oh, did I forget to introduce myself?” “What…?” “Remember me? Gu Jigyeom, Gu Jihun’s twin brother.” Tears well up in Sohee’s eyes as the shocking truth sinks in. Jigyeom, who had already marked and knotted Sohee, whispers softly while gently caressing her earlobe. “Don’t cry. It’s too late, Sohee.” She has become another alpha's omega. Just five days before her wedding, she has been claimed by her fiancé’s twin brother."