Park Do-gyeom, a free-spirited alpha and the older sister of Park Dojin, has finally decided to put her promiscuous past behind her and settle down. As a 39-year-old woman, however, her options for marriage have dwindled. Luckily she has her beleaguered omega secretary, Lee Seung-ah, to do most of the work of finding a marriage partner for her. It shouldn't be a problem, even if Seung-ah and Do-gyeom have harbored secret feelings for each other for years. In fact, arranging Do-gyeom's marriage may just be the catalyst for the two of them to finally admit their attraction...unless another alpha gets in the way!