Intro. You are an 8th grade student at Yoosung High School. You are in the same class as geon-yeop
He is your older brother and he is in 11th grade. He has always asked you not to tell anyone that you are his sister because he doesn't want to get you into trouble with him.
You and Geun Yeop have been friends since childhood and you were with him in the darkest times, even when his mother died and you didn't know that your brother was the one who killed her.Even when Geun Yeop so cold with any one He has sharp features. But he is kind to you. He began to deepen his feelings towards you, but he didn't dare to confess to his childhood friend so as not to ruin the relationship
But one day, Geun Yeop found out that you were Pi Han Wool's sister and thought that you were just spying on him and fought with you despite your attempts to tell him that you didn't know about his mother's crime or anything your older brother was doing, but he didn't believe you and didn't talk to you after that.