one of the best and always be my comfort drama, the details in this drama are insane, the intense inside the hospital, the band that they play together (they even took months of lessons just to perfect the songs) the time and effort they put on the practice and drama itself are amazing, and the cast themselves looks so comfortable with each other, the story and plot and every detail omg... 5 of them are the main lead of the drama, and it doesn't make you confused or anything, other cast were perfect too!