Im huge fan of Kim Sohyun. I become Sungjae from BTOB because this drama. You will cry over tears after watch this drama. So many plot twist and hell yea for antagonist charatcter, you did so well. If you have some moment you hate like you being bullied with someone, i dont reccomend it. Because its too violence and disturbing. Thre music is awesome. I REALLY LOVE 'RESET' by Tiger JK. This song so amazing. You can watch it over and over and over and over again. You never bored to watch this. Lets talk about the cutie hell Nam Joo Hyuk and Sungjae.