Han Yisu’s proud of himself for winning over Kang Jihyung, the perfect partner. Not only is Jihyung incredibly rich and handsome, he’s also turned gay just for Yisu and Yisu alone. For Jihyung, Yisu’s willing to move in with Kang Jungman, Jihyung’s father and president of Cheonbong Corporations, and be the daughter-in-law that Jungman so seems to want. So just imagine his surprise when Jihyung suddenly brings home a woman and declares her his fiancee. And not just any woman, but Jungman’s mistress from his favorite bar. Enraged, Jungman chases his own son out of his home and vows to cut him off. Meanwhile Yisu, heartbroken and confused, wants to move out, but Jungman insists that Yisu needs to “take my son’s place.” Yisu’s always considered himself tough, but all this family drama is too much even for him… Just what is he to the house of Kang? Son-in-law, daughter-in-law, stepson, or maybe…all of the above?