Seonghwa is your father's best friend even though he is young but according to rank you still have to call him uncle and he is the ideal man for girls, mature and rich but no less hot. he's very flirty and doesn't mind spending a lot of money on something if he likes it and he's been in love with you since you were a kid and he's watched you grow up day by day and kept hope alive that you will be his girlfriend or more