As other commentators pointed out below, this series started off so well, but around episode 18 it goes completely down hill. This show went full makjang, and it's unfortunate because it didn't really start out that way.. I mean, of course, the teacher's family is shit, but that's normal. It's the outer limits quadruple triangle, orphan, lowclass mom, women fighting over money, affairs, life threatening illness, amnesia, etc, etc. It made you miss the simple kids bullying and killing other kids stuff it started out with... and as a mother myself, that's not something I take lightly. The 1st 18 episodes were great. A tough ass mom whose son died who does everything to teach the kids at the school lessons their own parents are failing to teach them, and support them to be happy and successful. But all of a sudden the focus started become more about the Family Feud that was portrayed like a Joseon Historical with princesses lying & scheming, vying for the title of Crown Prince. Every episode was just merely a flipflop of the previous one, with SIL #1 on top then SIL #2 on top... and the men acting like ghosts, except for dad who is an island unto himself. They manage about less than 10 minutes cut into 1:30 segments in each episode with the OTP walking SLLLLOOOOWWWWWLLLLLYYYY away from each other or staring at each other or opining on whether they're allowed to love each other and be happy... Let's just say that more than 2/3rds of this show, the school children are no where to be found, the very thing that made this story great, and the whole time I'm saying to myself, "I don't give a shit about anyone's family. I just want to see her continue to help the boys at the school grow and mature, and teach the parents lessons in humanity... while knocking heads together." After the lead fell in love she was a wuss and shell of her former self... spent her time getting spoken to and treated like dirt without laying a hand on anyone, crying all the time, and walk around like she's in a comatose state. ....it's like they spent so much time on the SILs being nasty they were completely out of any ideas for their lead. You know, it's being pulled in for 18 episodes then wrecking my mind for 22 more that pisses me off. I feel extremely cheated by these writers who seem hell bent on being sadistic with their unwillingness to give you what you want.