This series was so good. If you watched  Bad Romance the Series and fell in love with the BL couple then you're really gonna love this because it's all about them and how they met and ect.
Story: The story was superb, It was something fresh and different for me. With BL stories they all end up the same way, Boy falls in love with a friend, keeps it a secret, tells another friend, Friend finds out, things get awkward,  afraid to tell family blah blah. This story had more twist and turns then those other dramas. It honestly shows another side of BL irl and obstacles they face and it has openly gay characters ;) Characters who aren't afraid to make it known that they're gay because there's nothing wrong with it and nobody really has a problem with them. They have a character my personal favorite Yihwa who would go to hell and back for her friends, doesn't care about their sexuality, all she wants is to see them happy and she is freaking hilarious may I add. The show had a good mix of romance, comedy and dramatic scenes that keeps you on the edge of your seat for every episode. 
Music: The music is really good and sung by Tul, the actor who plays Knock, who has an amazing voice btw.
Acting :The acting was so great, you felt the chemistry between Knock and Korn and it felt real. And the person who plays Yihwa is as badass and funny as she was in the Bad Romance series.
I say give it try, It's really good. Also if you want I personally recommend watching the Bad Romance series again when you finish this one, It just makes everything 10x more cute in that one xD Since it continues on their romance. Sorry if my review is all over the place xDD