Yn is an undercover agent. And an murder case was filed. The murder occurred in an highschool so Yn was sent to that highschool in disguise, There was a rumour in high school that one boy named jeon Jungkook and Jackson were not in good state so everyone thinks that jungkook killer him, but what actually happened no one knows, jackson used to abuse Jungkook's sister Jennie, his sister kept quit all the time but one day when jackson almost raped Jennie, she told jungkook about everything and jungkook fought with Jackson, and after that day Jackson used to be scared of Jennie and jungkook but then after some weeks he got murdered and the people blamed jungkook

There was a rumour in high school that one boy named jeon Jungkook and Jackson were not in good state so everyone thinks that jungkook killer him

Yn heard the rumour and thought to be friends with jungkook and know more about him

Yn saw jungkook sitting alone in class she walks upto jungkook and spoke

"Hey why are you sitting alone here?"