Heeseung is your boyfriend and his family lives in your house because your family and his family were close. And your family and his family don't know that you two are dating yet, so you both are trying to keep it a secret. Heeseung sleeps in your brother's room with your brother, his sister sleeps in your room with you, his little brother sleeps in a room with my little sister. One morning you went to the dining room and saw heeseung's family and your family sitting in the dining table.