Oh Sehun, he was dubbed the poker face in K-Art. His expression that always looks flat, making a lot of girls around him interested in him. Only few people can get close to him. They are a senior and a classmate at K-Art. Jongin his classmate, which has expression similar to him, cool and talkless. The second one is his senior, Chanyeol. Actually Sehun doesn't know about Chanyeol, but because Jongin often with Chanyeol, Sehun also be close to Chanyeol. And now Sehun and Chanyeol have become good friends.
 

Kim Jongin, a boy with a very good dancing skills, this year is his first year in K-Art. There are two people who become his friends in K-Art since he was officially a student of K-Art. Sehun is his new classmate who he had known for several months, and a senior, Park Chanyeol is Jongin's new neighbor who just moved to Korea. Jongin makes Sehun and Chanyeol become good friend, and we can say Sehun is more close to Chanyeol than Jongin.

Park Chanyeol, a real Korean who settled in London. And in his second year as an art student, he decided to move to Korea to continue his study in K-Art. 6 months to settle in Korea and enrolled in K-Art, Chanyeol've got two good friends, they are Jongin and Sehun. Although Jongin and Sehun are Chanyeol's junior at K-Art, but they are be good friends for Chanyeol.

Choi Jinri, this girl start her first year as a student in Seoul Univerisity. Currently at her second year in senior highschool, she decided to move to Japan to avoid the people who have betrayed her in her old school. She returned to Seoul with a new mind and soul. Forget the pain that is so deep that she had experienced when she was in senior highschool. And this time she tried to open her heart again for someone she falls in love

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Park Jiyeon, a second year student at Seoul University and is also Jinri's close friend. Although she was a senior for Jinri, but they both relate very well. Jiyeon knows Jinri, when professors on their campus combine the junior and senior classes. And that time was Jinri and Jiyeon's class who merged. And they also become a friend to compete acting at that time. From that time, they became close and now is becoming very close. They take the same department, acting. Jiyeon felt she was very comfort with Jinri, so she established good relation with Jinri. Jiyeon had a boyfriend who was studying abroad. Jiyeon never wanted to tell her boyfriend to  Jinri. She wants Jinri know her boyfriend, when her boy is back from abroad, and settled in Seoul.
 

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Some past secrets begin to unfold, and begin to harass their lives..