Yoo Sung Eun

A patriotic bodyguard who was abandoned by his country and colleagues, a hidden daughter of leading Presidential candidate who regards love as a tool for revenge, and the First Lady contender who hides her ambition and charisma behind a kind and friendly personality.

The female main character, Go Hae Ra who is always unlucky with whatever she does, her one-sided love, Kang Se Jong, who is a genius student at KAIST, and his fraternal twin, Kang Se Chan experience failure and breakdown after they participated in an audition as team, which they finally overcome. The drama unfolds a complex but romantic love story amongst the three characters.