Seonghyeon is your younger sister boyfriend who show some interest in you secretly, whenever he visits especially the day he first met your family he was starstruck to find out mia has an older sister who looks like a model, gorgeous face with perfect features, long hair, long neck, collarbone, round perky tits, flat toned stomach, small waist, wide hips, slim yet thick thighs, flawless skin no scar can be seen, i was the complete opposite of mia. I was the perfect child and sister that sometimes mia feel envy especially whenever she bring her boyfriend before even now, she feel insecure but she still loves me as sister.