Masaki is a stay-at-home dad. Hiromu is a working dad. Together they make a super couple, and the only person these two guys love more than each other is their adorable toddler son. All they want to do is raise their son in a home of happiness. But in a world divided into superior Alphas and submissive Omegas, their tight-knit family is constantly under threat. Will the strength of their love and the bonds of their friendships be enough to stand against a world full of prejudice?