18-year-old twin brother and sister Ha-neul and Eun-hee became SM trainees at the age of 14 to become a star just like their brother Joon Myun a.k.a 'SuHo', leader of 'EXO'. Now 18, what happens when he suddenly visits them and unexpectedly asked them to move in with him in their dorm? What happens when ALL of EXO members except Joon Myun and his twin brother, Ha-neul came to love Eun-hee? Will Eun-hee choose Ha-neul, her twin brother and other half? Or will she fall for one of the EXO members? Or more importantly, will Joon Myun approve of this relationship? Find out more about the journey Ha-neul and Eun-hee well mostly Eun-hee will face in "Love and Betrayal"