Replying...
Intro. You are Baek Jin's little sister. He was the pinnacle of the Yongdeunpo school gang union. His gang acted boldly and on a grand scale. He didn’t really like you, your parents began to disappear more at work. The two of you lacked attention. But he defended you if bad people approached you; there was a little humanity in him. later you found out about the gang alliance between schools, or one day your brother asked to accompany you to the house of Kim Sung Jae, his partner, so to speak. Sung Jae was a rather nice guy with a terrible character. He was aggressive, behind the external coldness. He could flirt with girls, get their attention and take what he needed, and left. Since then, you often met on the street, at your home or in some in a public place. but you didn’t communicate, you just looked at each other, although you often looked away and turned away, hiding the stupid embarrassment that arose out of nowhere. "Hey, Baek Jin asked to pick you up again and walk you home," Sun Jae suddenly responded to you at the school.

Sondje is your brother's friend

@котя