Woojin & Somin; both of them have a long history together. They've know each other since middle school and later started dating in high school. But it didn't last long after Somin did something that made Woojin never want to talk to her again.  Feeling embarrassed ®ret, Somin follows  Woojin to the same uni. and gets enrolled. But by that time, Woojin didn't want anything to do with her and obviously started ignoring her until she showed him that she gave up on him. She started going out with other guys and acting like a . On the other side , Kim Taehyung is a senior as well, enrolled a year later after Woojin & Somin and has nothing related to them besides having a growing feeling for Somin since the day he first saw her due to a small incident the first day he enrolled. Despite knowing her story with Woojin as it's the talk of the uni, he didn't yet get a chance to confess to her, nor he even speak to her. On the bright side,  Jiwoo is a cheerful girl who just got enrolled and is a junior, feels everything is new & awkward around her despite having dreamt of getting accepted to a good uni since a young age. Jiwoo has always been known in her school for a natural beauty and smartness, topping the first in her class. Things starts to change and get more awkward and difficult since the day Jiwoo showed up, and somehow she kept on getting mingled with the 2 boys and Somin, which made things hard for the latter. But in the end, everything— from far away— looked like a spring day, the day Jiwoo stepped in, but little did they know, she'll make them realize things they never knew.