Seohyun transferred from public school to private school during high school, the same school of Yonghwa and Minho. Since she is a bright student, she belongs to Class A section 1 with all the smart and bright students, she was the classmate of Yonghwa and Minho.  

The first day in school; Their teacher arrived early and announce the new transfer student to the class. "Class we have a new student in our class, Ms. Seohyun pleased stand up and introduce yourself. "  Seohyun confidently stand up in front and introduced herself " "Annyeonghaseyo, I'm Seohyun", please to meet you all, with a big smile. Everyone welcomed her warmly and she was happy. Her seat was behind Yonghwa.

She was very happy and able to make friends with other classmates, sometimes Yonghwa helps her with the assignments and during quizzes. She doesn't interact with Minho, he was a snob and was seating far from her. All 3 of them were classmates for 4 years in blocked section. There was not much interaction between Minho and Seohyun. That time Minho has a girlfriend who is popular in their class. But Yonghwa has no girlfriend for the whole 4 years in high school.

Fast forward, they all graduated from high school, Seohyun moved to Seoul and enrolled in University, Minho enrolled in a popular school for Medicine and Yonghwa enrolled in a school to become a priest. Seohyun did some part-time job to support her allowance, she was working in a Famous Pizza Restuarant, where all the celebrity and rich people hang out and also doing some part-time commercial modeling. The three of them haven't met after they graduated from high school. Until one lun