Because of one of the letters she writes to help win someone over, she ends up meeting Lee Young (Park Bo Gum).
Do check out which guest came out on each episode The plot follows a class of high school students attempting to overcome the stress of being ranked by their exam grades, and facing the difficulties of being a teenager in a high-pressure, corrupt system.Jin-wook and Yoo-mi meet at a Gangwon-do resort and get caught up in a series of misunderstandings and accidents.Yoo-mi was charmed by Jin-wook's sly and playful personality, and they unexpectedly spend the night together.Jin-wook asks her the reason why she left him and she replies that it was just a one-night stand. She is very energetic and receives recognition for her work, but her only interest is in CEO Eun Hwan-Ki. So-Rim has fallen in love with Han-Gyul at first sight and has made up her mind to find him and confess to him.Through many encounters, Han-Gyul at first rejected So-Rim due to her age and due to the fact that they both don't know each other.
Min-hyuk and Bong-soon find themselves and their relationship growing into something more.