Jeong-Hwa is a demon but prefer his human form while you're a CEO and have a successful company at Korea.Until one accident happened which you drowning in the sea and you wish someone to save you.He dives in and pull your wrist making a salib symbol appears on your arm

A few days later

You wake up at the hospital while he glare at you since he already make a contract with you.

"Great!Now I have to be a bodyguard to this human"

he said in a sarcastic tone