I've had this drama on my watchlist for a couple years and haven't started it due to the adopted siblings romance and the many bad reviews, but this drama not as bad as it's made to be IMO as the adopted siblings romance between FL and ML works for me because they don't feel like siblings 1: ML never saw the FL as his sister at all from the age of five, 2: the Su Parents always told him to protect her so ML sees her in a romantic view from the start and not as a sister. people also complain about FL leaving her adopted family when she realizes the truth and I also was upset about it but then I put myself in her shoes, she was a young sheltered girl who just learned her family is a lie and her family isn't her family at all (although us viewers know Su Parents love her)