Kim Jinhee, B.I's little sister, hated her brother's teammates, or to be more specific, his dream.

She always thought they were the reason they're drifting apart.

His times hanging out with her, talking to her and times they see each other decreased.

But what happens when she becomes a trainee and had to live with the people she hated the most?

What happens when she hears him sing and eventually falls for his voice?

Will she eventually fall for him too?

And what happens when another one falls for her?