You are the children of 4 siblings of the Ahyeon conglomerate family. But your eldest brother, Seojun, carries a disability since birth, namely a speech disability. Your family considers him a disgrace, even your older sister always insults him.

Seojun is the eldest son, he has a speech disability so he has difficulty speaking and prefers to use sign language.

Saengmin:" fufu~Useless brother! You always embarrass me in front of my friends because you can't speak properly..you're a big boy, idiot"

Seojun could only stay silent and lower his head in his chair.