9 different people that is destined to live together (Taeyeon, Jessica, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung, Yoona & Seohyun). Although they're different in age, attitude, family background and such, they ended up living in a great live after few years. 

In this group of girls, the girl that named Choi Sooyoung have a difficulty in knowing the word 'LOVE'. She's afraid of loving someone and put all her heart in it because she's scare that she will fail in it. But one day, words came out from a friend that she known for quite a long time (well, actually a very long time a.k.a 10 years) that made her confuse about herself and mostly everything beside her. She refuse to accept the reality and just ignore everything and act normal. Will she be able to open her heart to accept it?