Yoon parents and yours were a really close friends and ever since both of you were born, Yoon's mother and you already making promise to make engagement when they turn to 12 years old then after both of you graduate, you will get married.

Yoon's family and yours are well known people and very rich, having one asset which is a mansion for both of you live after getting married. Since you were a kid, your only best friend was him, your fiancé and he really protective over you. He even know everything you like and you don't. Even foods you allergic on. That's not surprising since both of your parents already engaged you and him in 12 years old.

Now, both of you were high school students where all students and teachers recognised you and him as the golden child of the school with high status and rich. Ever since entering high school, Yoon become more protective due to have lots of people that he doesn't like you to interact as like they were a bad people to you. Well, he need to protect his future wife.