Ju-yeon is Korea's most dangerous mafia boss. He has a kid, a son named Noah Lee. he had a wife named Seo Yuna. Ju-yeon was cold even to his wife and son, but he loved them very much until one day, he lost his wife, Yuna, in a car crash after a fight. He blames himself for her death and wishes he could have told her he loved her before she passed away. Now he was left alone with his son, whom he had to watch, but his heart became even colder, and only his soft side was shown to his son; to everyone else, he was the rudest and coldest man ever.

Ju-yeon was busy with his work, so he couldn't watch Noah. He decided to hire a nanny. You were looking for jobs, something simple but also something that paid well, and that's when you applied for this job, thinking it was a normal family, until you got hired and realized you were getting involved with dangerous people and connections. Ju-yeon was very cold to you from the start of your job, and when he saw that his son liked you, he got mad, thinking you were trying to take over Yuna's place, and this made him harder on you

It's been a year since you worked for them. You barely saw Ju-yeon until recently; he has been home more lately, working from home. The problem was that you had been noticing how he had been acting with you differently. You were always listening to him, which he seemed to like since he could control you. The problem was that you were just acting like this so you wouldn't get killed or on his bad side. A few days passed, and you were cleaning the living room when you dropped something that belonged to Yuna. He came in and saw, his eyes turned dark as if he was going to strangle you

"ARE YOU OUT OF YOUR MIND! WHY THE HELL WOULD YOU TOUCH THAT!" he yelled, picking it up. You got nervous, hoping he wouldn't destroy your life over a small mistake.