Mi Nyu is visited by Hoon, who asks her to dress up as her twin brother, Mi Nam, and temporarily take his place in the most popular idol band in Asia.
Posing as Mi Nam, Mi Nyu moves in with the band members to the dormitory. At the press release party, she drinks too much and vomits on Tae Kyung.
Tae Kyung finds out that Mi Nam is actually a girl and threatens to tell everyone. Mi Nam tells Tae Kyung that she will tell them herself.
The fans accept Mi Nam when the news comes out that Mi Nam saved Tae Kyung from drowning.
Although the stage performance was a hit, Mi Nam is upset to find out that his mother is dead. Meanwhile, Mi Nam's aunt shows up at the studio.
Yoo He Yi goes to the A.N.JELL agency with tickets for her new movie premiere and gets humiliated by Tae Kyung. She feels jealous toward Mi Nam.
After Yoo He Yi's movie premiere, Tae Kyung and Mi Nam go to the countryside to visit Mi Nam's father's grave. While there, Tae Kyung gets lost.
After singing a song that Tae Kyung wrote, Mi Nam is overcome with emotion for Tae Kyung. Meanwhile, Jeremy realizes his attraction to Mi Nam.
Mi Nam congratulates Tae Kyung on his birthday and they spend an evening together. He Yi becomes jealous of Mi Nam.
He Yi finds out how Mi Nam feels about Tae Kyung and threatens to expose her. Mi Nam tells He Yi that she will tell the members everything and leave.
At the music video premiere, Mi Nam shows up dressed up like a girl, but Shin Woo tells the reporters that she is his girlfriend and covers her up.
Tae Kyung is shocked to hear from Mo Hwa Ran that she would have been a mother to the twins if Go Jae Hyun hadn't passed away so early.
Tae Kyung gives Mi Nam permission to like him. Reporter Kim finds a picture of Mi Nam dressed like a girl and takes it to President Ahn.
Mi Nam plans a trip with Shin Woo to Busan to meet his parents, but Tae Kyung shows up at the airport and tells Mi Nam that he likes her, too.
At reporter Kim's insistence on interviewing Mi Nam and Mi Nyu together, Mi Nam is sent to Japan until the real Mi Nam can return.
Manager Ma asks Mi Nyu to pose as Mi Nam one more time to hide the fact that Mi Nam is working behind President Ahn's back. She reluctantly agrees.