Is that.....BTS??

A girl, named Hong Ra On is a Korean idol her life may be amazing now but her past life was her only nightmare her brother, hong min yo who abused her when she was Young. She attended an academy for all idols there she meets BTS she was rude and horrible to them .........

She becomes closer to them that's when her heart changes, a member becomes her love...

Who may it be? Which member changes her heart?