'I had a one night stand with the first person I met, but I conceived a baby.' Everytime this omega had a boyfriend, the relationship always ended up with being cheated and in the end, he even got kicked by hearing the words, “You are an omega, but I’m not attracted to you". Haesoo, who was chugging alcohol while bursting out his anger at a friend who comforted him, get wasted by a drug, and to make matters worse, the heat cycle overlaps. Alpha Do-geon, who was in the same pub, notices the condition of the Haesoo. Do-geon tries to help Haesoo and get away from the place but he is tempted by Haesoo and ends up spending the night together. In the morning, as soon as he wakes up, Haesoo hastily ran away and finds out that he is pregnant 4 weeks later. Haesoo decides to raise and make the child happy by himself. After 4 years, Haesoo and Do-geon are reunited...