So, I can't say that I am extremely knowledgable on Kdramas, as I have only watched 5 or 6, but I can say that KMHM was the best one I ever got to watch. The story was so beautiful, exciting, intriguing and also innocent that it kept me watching and watching day and night. First of all, Ji Sung was great at portraying 7 characters. The chemistry between the main roles were also amazing. The acting was absolutely phenomenal in general and every single character was interesting on its own. It was so different from the other dramas I watched, and now after KMHM I cant find anything good to watch because of high expectations. I am planning to rewatch it a year or two later, so that I can forget the details a bit and enjoy it as much as the first time. Highly recommended, just watch the first episode and you will understand how good it is.