Hyunwoo, his twin brother, was the most important person in Yeonwoo’s life. He already wasn’t happy about the sudden marriage, but to marry a guy who’s only got good looks, a cocky attitude, and money? There’s no way he could ever support this marriage...! But before he had a chance to object, the two rushed into marriage. Because of this, Yeonwoo constantly wished for his brother’s divorce. Then one day, Yeonwoo got a call from his brother-in-law, the thorn in his side. Worried about his brother, he reluctantly visited their newlywed home. And there, Yeonwoo ended up crossing a line with his brother-in-law... Can Yeonwoo still maintain a peaceful family after this?