SungGyu lived at one small home with his mom and his younger brother, SungJong. Their dad died in a car accident when SungGyu was just a little boy and when SungJong was just a baby. Since then, SungGyu acted like he was the man of the family. He helped his mom taking care of the little SungJong and also helped at cooking and stuff like that. For him, that was everything he could do for his beloved mom tha