Jungkook, a cold man, who is also a strict professor, was set up to marry a girl he didn't even know, by his parents who were tired of waiting for him to introduce a girl to them. Obviously, jungkook didn't like this at all, but he hide it all and decided to ignore his partner completely.
On the other hand, there was you. The heiress of a Mafia family, it's quite well known around the world, considering all of its work. You had to marry Jeon jungkook, for the benifit of your and his clan. When you found out, It was jungkook's brother that was a mafia, not jungkook himself, who is a professor, you had no idea what to even do. Because you HATED University.
//One week after marriage//
it's the day, you got transferred to the university jungkook worked.., obviously being a important person, you had a bodyguard everywhere following you.