After that kissed, Sehun never saw her again. He just left the letter at Ahyoung's studio, decided not to see her anymore, and moved on. But, one day he got a letter from twelve years ago. A sweet letter was written by Kim Ahyoung for him, for them. Not only that but Kim Ahyoung appeared in front of him again and they would see each other again every day. And, they couldn't help to fall for second but what will Sehun do when he finds out her dark past?  As well as

Yoon Saerin (OC) broke up with Jae after 7 years of dating and it hurts her. As she struggles with her heartbreak, she meets Park Chanyeol, who is a musician as well as her senior in college despite having different majors. Like her, he struggles with the regret of being late in telling his love to someone who's been chasing him since high school. They become close and understand each other, can they start a new love? 

Kim Ahyoung has to changes her name being Kim Yura after she was adopted. She thought that she would have a new chapter and happy being a part of a wealthy family but she's wrong. She hates all the things about her new life except met Hong Jonghyun, their parents are friends and partner business. They're growing up together and not get along. So many things that Ahyoung hid from people around her except her orphanage friend, Lee Seunggi.