As a fan of thriller mystery dramas this show for me is 7/10. The plot is good and the acting is decent but the twist is kinda predictable in my opinion. The repeated flashbacks are sometimes unnecessary to the episodes but overall it’s an okay drama. The standout actor to me is the hyung, it was hard to figure out if he’s in the good or bad side and I think that’s a good thing when you watch a mystery drama. The characters being mysterious adds thrill to the plot. For the music, it’s so-so, not in the line of OSTs that you would want to add to your playlist like other soundtracks.