The main thing that lacks in majority of the kBL dramas is chemistry between the main leads. Sometimes the plot is quite good but their chemistry ruins the whole thing. Majority of the time it's only one of them being spontaneous and the other one just stands still. Semantic error actors did a great job potraiting their characters really well. Only to my star and light on me characters had this level of chemistry. No one could've done a great job as Sangwoo other than Jaechan and surprisingly I liked the live action Jaeyoung more than the manhwa. It's a must watch for BL lovers and good quality drama lovers in general.