Unlikeable characters (apart for Yihwa), and bad casting in my opinion. The side characters bored me to the point I was skipping their scenes and just getting back to Korn and Knock, and even then I wanted to knock their heads together.

Knock is a really horrible person who plays with Korn's emotions, and Korn feels very lifeless in the show. I appreciated the steamy scenes, and for being one of the first and only BL dramas I've seen that even shows deep/extended kissing and implied sex scenes (and shirtless kissing!), so that redeems it a little.

It's also obvious Yihwa is a main character from the previous series, so it seems like she kind of takes a lot of time up on the screen, and it almost feels like they make a convoluted plot that didn't need to be so complex just so they could get Yihwa to sort it out.

Also, as a side note, the translations available are poor and not brilliant for English native speakers, so the subtitles can trip you up and take from the scene (especially since LazySubber on kissdrama actually translates the scene well, but adds too many translation comments at the top that get in the way, yet the youtube HD version completely butchers some scenes).

Honestly, I just watched it to the end because I wanted to say I'd finished it and given it a chance, but it's not brilliant. I much prefer SOTUS over this and I recommend starting with that one if you're dipping your toes into Taiwanese BL.