Myung-Ok -A cute,nice , warm-hearted girl and being called "Principal backbone"along with In Young .A college girl that is in love with Park Jung Min.However,Jungmin pursued his study outside the country until one day when he returned,Myung realised Jungmin didnt actually treasure her as much as she loves him .She has two best friends named In Young and Hyung Jun .She then becomes best friend with Kyu Jong that always there when she needs him.However an incident change everything in her life.

Kim Hyun Joong-A handsome,good looking boy who lives in overseas since he was small.A very cold guy and really furious when his parents asked him to return to Seoul.Is Young Saeng's best friend since he was little .He loves to tease Myung and pull pranks on her .Day by day,he realises that he actually like Myung.

Kim Kyu Jong- A son of a famous business man.Has a sweet smile and good looking. Become Myung's friend when he enters Myung's college after he is back in country .He becomes an advisor to Myung whenever Myung feels sad .When one day he leaves Myung because of his hurtful secret .He is also a younger brother to Kim Ji Kyoung

Park Jung Min- Son of a rich conglomerate .His mother asks him to pursue his studies overseas and left Myung.However,after a few years,he realised that he actually love Myung as a sister,not more than that.He then hooks up with Kyu Jong's sister and feels guilty towards Myung .

Heo Young Saeng- A shy,charismatic looking and very calm man .He is Hyun Joong's best friend .He becomes Hyun Joong a place to lean on whenever Hyun Joong has problems .

Accompanied Hyun Joong at the overseas and returned to Seoul together.However,back in Soeul,he began to beg for his childhood's love that he has left a long ago .

Kim Ji Kyoung-Kyu Jong's sister.Didn't follow her family to overseas because she was taking care of her grandfather at SeouL.Kyu Jong described her as a goddess .She is really close with Myung and In Young since she accidentally metthem on a cinema before.She then fall in love with Jungmin without knowing that Myung had past relationship with Jungmin.

Kim Hyung Jun-A pretty flower boy.Known as the most popular boy in college.He never stick to a girl.Although he looks playful and childish,he always comforts Myung whenever she feels sad.He is also Jungmin's cousin.

In Young - a very talkative girl in school.She is the childhood's love of Young Saeng.However due to Young Saeng's absent  since he went abroad,Young has lost hope to Young Saeng and does want to think of him anymore. She has to be Young Saeng's partner when working on their college's exhibition and make her slowly accepts Young Saeng back in her heart

And the friendship and unexpected love colour out this story ..

What is exactly Kyu is hiding from Myung ? will Young Saeng will be forgiven by In Young?