Seong Ha Rin and Park Chanyeol are both high school students living their everyday life. Having been together since birth, there was not a day they did not see each other and experienced the same things. That is until Chanyeol starts his trainee life and tries to balance both friendship and training. The same personality, the same background and hardships - the same feelings?      

Kim Mi Kyung meets Byun Baekhyun at her school who happens to accompany his mother during a school inspection for a few days.  Already knowing he is a jerk, she starts avoiding him while he starts getting interested in her. What if this changes and it'll be the other way round? Will their feelings meet halfway?