Park Somi, sister of the famous Park Jimin of BTS.
Although her brother is famous at school she's lonely and quiet back in school. With changing appearances, she leads a life alone.
Her brother always invites her to his concerts, and that is where she meets her bias, Jungkook. But he doesn't acknowledge her feelings for him. Nor does the members know of her existence.
Jeon Jungkook is the King of the school she goes to. He's always surrounded by girls, but he never had a girlfriend.
One afternoon after school, she followed her bias home. It was going all well before he caught her on the spot.