Song Jihyeon, has been away from her family for  4 years now. She was sent to US as an exchange student since she was in 9th grade. Coming back to Seoul to study college, she has to live with her Elder sister, Snsd's Seohyun. Her identity was unknown to the world. The people around her doesn't have any idea she's a sister of a kpop star, not even Snsd's member knew that Seohyun has a younger sister, Except for Yoona. She's childhood friends with the both of them. Upon her stay

What if a local Filipina-korean girl was chosen to be the Best girl group's Daughter? The season 2 of Snsd's Hello Baby, only, it's not a baby that they would be taking care of, but a 15 year old, highschool girl, living in the Philippines.  It would be a bigger challange to the nine of them. Living in a foreign country for a year and trying to get to know and take care of their "daughter".