When the country's famous and notorious flower boy makes you his next target to get your heart broken by him, how would you shut him out in order to keep your walls guarded? 

Kai is charismistic, y and charming. Though women fall at his feet to worship him, no one ever bothered knowing Kim Jongin. 

To make things worse, Kai's best buddy seemed to have taken a great interest in you too. Oh Se Hun is the next popular guy next to Kai. After all, birds of the same wings flock together, don't they? Or maybe Oh Se Hum was totally not what others though of him to be either. 

What happens when both of them barge into your life rudely and find themselves showing you their sweet vulnerabilities? And you, letting them in unknowingly?