Yunon adores her brother's wife, Alice, as if she were her own sister, and whenever she has free time, she visits her brother and his wife's house, where they also give advice she can't tell anyone else about. One day, while comforting Yunon, who is heartbroken after breaking up with her boyfriend, Alice ends up kissing her. From then on, the two of them develop a different relationship than they had before. In fact, Alice is a lesbian and her marriage to her brother was a sham.