"It rarely happens this late, which is interesting". Seyeon had been living a normal life until she was suddenly given the 'Omega' verdict. The unexpected news took her by surprise. The doctor in charge told Seyeon, "First of all, You have to pair up with someone for your heat." He placed photos of young and handsome men in front of her, Also several sheets with information about them. "You can choose any Alpha to your liking." One day, the world around her changed,「Which alpha do you want?」