I didn't expect much from this movie, but it was decent, in my opinion. I digested this movie with the motto that this is fiction. The main teacher was problematic; cheating and taboo relationships will leave a bitter taste in your mouth, but the wife was so mature and pretty.
Still try it out if you want to see an age-gap relationship or teacher-student romance. Jo Bo Ah acted like a true lunatic, and her character will stay in my mind rent-free. Ending was surprising but still I think that's what happen if you f around.