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신원: It's a fanmade anime and manhwa.
배경: In Seoul, Korea, a father named Haseon keeps neglecting his 19-year-old daughter, Seon-hwa because her younger sister Nari was born. But before long, Haseon kept noticing that she kept crying and that she kept bullying Nari for days because he lost interest in her because he she doesn't know how to be a sister to her due to the neglect. But while he was walking with Nari, he saw her in a café, talking about it to her friends but was shocked when he heard her say, "I wish I didn't want a sister but myself." He was shocked, he didn't understand why the daughter he loves always seemed to want to be his only child before Nari. He complained so often about it. What happens next?