Five friends, one story.

Kim Jongin is the famous drag car racer. He was trained by his uncle when he was younger. He is an orphan but made a name for himself and now he is living by himself in his gangnam apartment. His only family are his close friends.

Jung Krystal is a famous model. Givenchy, Tom Ford, Seoul Fashion Week, you name it, she’s walked it before. But Krystal is keeping a secret that no one knows, not even her closest friends.

Kang Seulgi is a famous ballet dancer. Her parents owns the prestigious arts school, KangHan Arts School. She has been doing ballet her whole life. Her mother is the famous ballet dancer and now teacher, Han Jooyeon.

Oh Sehun is the son of Ohsong company. He is the heir to company since he is the only child. He is very quiet and mysterious. Sehun has a secret, that only he himself knows.

Son Wendy is a famous opera singer. She was trained at KangHan Arts School since she was young and is a very famous singer now. She’s sung at the most prestigious awards, concert halls and stadiums. Even though her genre is opera, she still have a lot of younger fans.

This story is about five friends. At twenty-one years old, these five friends find out the truth about life, friendship, love and just about everything else. They will get heartbroken, backstabbed, gain new friends, lose some, but it doesn't matter since they will have each other. People say friends are family you choose, and the five of them will take these words through up and downs, heaven and hell.