try *cinderella and the four knights*...kill me heal me...strong woman do bong soon..who are you school 2015..LOTBS..The best hit..

the ost was very good :) I would like to recommend it!!!
try to watch it and enjoy

 MichinYeoja:

Kill Me Heal Me with jang jae in-auditory hallucinations


Yeah, this ost make me feel so much emotions and it fits perfectly with the main couple 

Its Okay, that's Love

Correct me if i am wrong but i'm shocked that i haven't seen anyone type HEARTSTRINGS. That is one of my top OSTs in any drama. Flower boy band is another but i've seen that has been mentioned.