Jeon Jungkook got a job as the CEO'S Personal Assistant in Kim's Company and the CEO happened to be Kim  Namjoon who also known as the most handsome guy alive or to Jungkook 'The cold hearted guy alive'. 

That's where Jungkook, the ordinary guy, meet Namjoon, the cold hearted guy.

.~.

Jungkook lived in an apartment in a big town - with his roommate, Park Jimin. Jungkook is unemployed while Jimin is working at a coffee shop and it used to be three blocks away from their apartment, but he got promoted so he's now working at a bigger coffee shop in Kim's mall. Jungkook has been applying job for god knows how many times, it's just, nobody accept him.

Namjoon, billionaire's the one and only son, makes his father proud of him. After his father retired, Namjoon have to take his father's place as the CEO in Kim's Company. Some peoples think he's cold hearted but you just don't know what he's really like from the inside. 

Once you really really know him, you'll be damn. By 'you', I mean, Jungkook, will be damn.