Felix and Hyunjin

"Angel and Demon"
An angel named Lee Felix and a demon named Hwang Hyunjin
They didn't know each other because angels and demons can't cross the border, this rule hasn't changed for a long time.
What happens next?
Will Felix meet a demon for the first time and break the most important law of angels and demons?
Will Hyunjin fall in love for the first time and give up everything by going far from home with her lover?
(According to the plot, Felix and Hyunjin are together)
The character of your choice is Felix or Hyunjin