Such a cute a sweet drama! Im glad this drama didnt take the route of psycho where the main lead was both. I'm glad that he was justing acting like his brother. The male lead has a twin brother but he died so he would act as the younger brother in front of his ill mother. This was his secret that no one knew about. The female lead and male lead were high school classmates. At that time the male lead liked the female lead and even confessed his love through a love letter. Unfortunately that love letter got posted up in the whole school for everyone to see.
The female lead is a reporter which she needs to interview the male lead. The male lead acted like his twin brother and helped to her to lie about their marriage to the female lead's mom. Thus creating a co habiting.
Their relationship is pretty cute and believeable. They have a good chemistry together. I liked that the female lead has brains and is smart. She wont give up without a fight. There are some annoying characters but they have little screen time which is good.