Original Title: 내 누나는 야설작가
Sang-cheol and Gyeong-mi, who remarried, each have their sons Ho-young. I have a daughter, Jeongyeon.
Jeongyeon was a story writer who didn’t match her youthful appearance, and she was a passionate woman who did whatever it takes to get the subject of her writing.
After seeing Ho-young due to her mother’s remarriage, Jeong-yeon, who decides the theme of the novel as the forbidden love of siblings, cannot feel the feelings as her only daughter, so she tries to seduce her half-brother Ho-young to make use of that feeling. In response to Jeongyeon’s temptation, Ho-young refuses to give up her temptation, saying that she cannot be in love with the person who will become her older sister. Eventually, Ho-young gradually falls into the temptation of Jeong-yeon, and Jeong-yeon successfully writes a story based on her experience with Ho-young. Ho-young, who doesn’t know her purpose, really likes Jeong-yeon. What will be the future of siblings?