S2013, E6: Do Yoon lives a hard life as a 9th grader. It's tough enough acting as Na Ra's school slave, but whether her birth mother, who shows up after ten years, doesn't know the reality of school violence, she only gets mad. She asks, "Why do you just let them bully you like an idiot?" Meanwhile, Na Ra picks Do Yoon's friend Joo Kyeong as her new bread shuttle.