I honestly think this drama is overhyped. Like yeah the premise is really clever and refreshing but what more is there to it? The storytelling is really boring, the characters are unique but not interesting and the overall, nothing about 3/4 of the drama is gripping. I only started to enjoy it from episode 14 onwards but even then, I wouldn't say that I loved it. Yes, I love some aspects of it like the synergy between Ko Munyeong and the brothers and I was really impressed by the acting of most characters but overall, it was boring. It took me half a year to finish it. I would recommend it to someone that wants a refreshing premise and storyline but not because it's particularly interesting or gripping in any way. Lastly, the whole thing about her mother coming back to life with a different face? I mean, come on we're not 5.