Kim Jonghyun. A young and good-looking boy, the head of YOIM Bussiness Center. His dad, the founder of YOIM, a powerfull man, a single parent, taking care of his 2 beloved kids.

Jonghyun's mom died in a accident when he was 7 years old. He couldn't get over it. His dad said he will never meet another women like her. He said it was too late for him to remarry, because his kids were grown up. Because his kids wouldn't love another women like they loved their mom.

While Jonghyun was occupied in his bussiness man job, his sister, Sodam was a popular dancer, a beautiful woman, and a great fiancè. She always loved to little brother, but they loved each other to death.

And in a ordinary day, Jonghyun and his best fried, Minho, walk to a café. There, behind that corner, was the human that Jonghyun felt butterflies in the stomach for. The one who Jonghyun couldn't stop smiling thinking at. The one and truly love of Jonghyun.