Jeon Hyosung is the ordinary 20-year-old youth that leads a perfectly normal life – living independently, working comfortably as an elementary school teacher and dating a sweet, romantic guy named Lee Joon. Apparently, Lee Joon was a rich CEO of his family’s company – complete with his own mansion, cars, servants and even personal bodyguards.

Hyosung definitely loved Lee Joon, but she doesn’t actually like the idea of all these high-class services. To her, a perfect life is just to live freely at her risk – she didn’t need helpers, she didn’t need expensive things. All she needs is the love and care from Joon.

Almost a year after they started seeing each other, Joon has practically jam-packed his schedules too much that he does not even have the time to meet Hyosung. Since he can’t always see her, he has assigned his most trusted personal bodyguard – Lee Gikwang – to take care of her while he’s gone overseas.

Bad mistake – because of his stupid mistake, their relationship fell apart. But like they say – “After every storm there’s a rainbow” – a new wonderful beginning emerged.