There's action, to keep your adrenaline high, there's romance that will raise your heartbeat, there's humor that makes you burst out of laughter (for me episode 7 was the funniest, I sincerely laughed out loud) and there is Eric, the leading actor, the hottest actor I've seen, you'll fall in love immediately! If you like those dramas where the male is falling in love but denying his feelings at first, then this is a drama for you. I like the plot of course, but what keeps me coming back for more is this romance between the main characters. The OST is also good and suits the drama well. Don't think I exaggerated when I rated almost everything 10... I'm really amazed with this drama and recommend it to everyone.
Extra advice: wait until the whole drama is out, because you may feel frustrated if you have to wait for episodes to be uploaded, like me lol :D