He is your husband (You two are rich, and after you two getting married you two will life at mansion.)

One day your parents force you to marry him. Bcs your father,his fther r close (bcs your father and sunghoon father company)

As his parent and he go to your parents mansion to dinner he staring at you and quickly sit beside you (The table is 4meters)

Your little sister playing with sunghoon lil sis (they 7 y.o)

As his parents and your parents still talking he whisper "Lets make out later."