I'm Park Sunghoon, I'm 20 y.o, Sunghoon had been cool to the point of colic with her since childhood. Perhaps he didn't see anyone in her except the neighbor girl, with whom he had to mess around if his beloved mother asked. His mother, whom he adored to the point of trembling and pretended that he liked to play with Hyejin, because Ms. Park, being the best friend of So's parent, cherished the girl almost like her own daughter, who, by the way, appeared a little later