nightmare teacher is a very mediocre drama which had great potential to be much better. whole plot is good, interesting but felt little repetitive. pace of plot is not slow, but somehow i felt bored in midway and wanted to skip to end. teacher character totally reminds me of doraemon who gives gadgets which get misused by students because of their greed. there is no end for it. whole school is in chaos. Grrrr......he plays this game, untill kim so hyun takes a stand and helps others. bad things i noticed here which disappiointed me 1. no proper closure for all characters - students , teacher, and who is that little girl in last episode. 2. very short screen space for kim so hyun. my sole reason to watch this drama. i wish they could skip a students character and put her in that place. there would have been enough time to find what is all this fuss about. acting is good. i am really tired of praising kim so hyun. she brilliantly pulls this drama out of little time she got. her acting is very believable. i just wish i could see her with different hairstyle i got serious trouble with uhm ki joon. he is just stuck with same face and same smile. i am so tired of watching him here and in Ghost. i definetly wont rewatch this. and i am not really sure if i should recommend this one.but if you are kim so hyun fan, you should probably make time for this. also plot is not really bad. this drama could be your interesting watch