"Many people said love is BLIND but for me that's CRAZY thing." - Kim Seo Yeon

"I thought I'll never fallin love with another girls except her. But now I can't forget all about that stanger girl." -Oh Se Hun

"I know she is different. I think she just my bestfriend. But now I don't know what the meaning of... bestfriend." -Lee Dong Hae

"She's my sister. I'll protect her until I die." -Kim Jae Joong

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Seo Yeon just lucky girl who live in Kim family. She has a good manner and reserved. She grows like a princess. She never know about what the meaning of love beside her love for her family. She never dated and do something like teenage do. Boyfriend, she never imagine about that. She had a childhood who always do everything with her. Lee Dong Hae, heir of WINNER Corp. And she had old brother who always beside her and protect her. She lives perfectly until she meet someone at the orphanage while she does social service.

Oh Se Hun, son of the owner of the orphanage, who always show a cool side. He never talking with Seo Yeon or other girls. But he has a lot of fans in his school. He started his live as college student and he meet again with Seo Yeon. 

Lee Dong Hae is the heir of WINNER Corp who always beside Seo Yeon. But someday he is hesitate about his relation with Seo Yeon. 

And Kim Jae Joong who had a big secret.

How about Seo Yeon's stories with three men in her life??