I was so happy that Prof. Park experienced the same pain when Nam Gabin broke up with. He was the worst among the 3 cheating husbands because his wife sacrificed a lot sending him to school,neglecting herself just to make life easy for him. I don't like the ending,you made your audience fool's,it was so out of context. So instead of rating you 5 as it was an enjoyable series am giving you 4 for an unacceptable ending.