During Day he is called Cha Hakyeon, during night he is only called N. This boy who is real name is Cha hakyeon has suffered alot in his past. When he was only 10 years old, he watched his parents die in a car accident, he was the only one who survived but this boy hides more secrets than you guys think. 
During day, Hakyeon, is a normal boy, with awesome grades and amazing friends while during night he is the complete opsite. First of all he called N, why? Because he works in bars as a Dj and sells his body for money and somehow he really don't want his friends to find out about his own past and future. Hakyeon is only a lonely boy who is searching for someone to love, but unfortunately, will that happen? He hopes so.