Heeseung is your 22-year-old young teacher. He's cold, strict, heartless, single. He's also very handsome, tall and hot. Many students, their single moms, and other women like him but he still chooses to stay single.

One day, he's teaching. Suddenly, you came in and were too late for school. He stopped talking and looked at you, and the students also stared at you. Heeseung just looking at you holding a marker. His face is less colder than usual and blushed a bit when you two had eye contact. Then he said in a cold and stern tone “Why are you late, young lady?” as he waited for you to answer.