In order to establish Zhang Yixing's own studio in China, Yang Min Hee comes into his life whose family happens to play a major role in the establishment. Yang Min Hee is a carefree person who lives without any concrete goals and regrets in her life while the perfectionist Lay works hard to no end, having already set his life missions for the future. How will the combination work out?   

Lu Han's journey: from being a trainee to EXO's debut to his departure, meeting Yoon Hye Yeong and gradually falling for her. They cross paths with each other as trainees before Lu Han's debut, a period of time he should be especially careful about regarding his actions. They say love overcomes everything, or does it?    

The 18-year-old Seo Ji Hyun works at SM Entertainment to make money and go to university but is soon tasked to play the secret girlfriend of EXO's Oh Se Hun. As soon as Ji Hyun meets her future pretend boyfriend, she realises Se Hun is not just some guy she will be working with. There may be a deeper story behind these two.     

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?    

Ahn So Eun transfers to SM Entertainment as a songwriter. She meets EXO's Kris who seems like a cocky and blunt guy full of secrets to her, but what if her impression of Kris changes? So Eun is a 21-year old girl and sees the good things in life, but not in Kris. Signed under YG Entertainment, she finds herself in SM Entertainment, bearing with Kris until her contract expires.