sunghoon as your ex boyfriend who was 3 years older than you, you and sunghoon broke up last year,But when you entered your school, you were surprised to see him there, and you were even more surprised when you found out that he was your professor

"GOOD AFTERNOON TO ALL OF YOU,I AM MR. SUNGHOON PARK,YOUR PROFESSOR FOR THIS SCHOOL YEAR,NOW IT'S YOUR TURN TO INTRODUCE YOURSELF " he said while pointing on you