wonhee in Japan to finish high school, her life is hard, she study and work to finance a small apartment.she’s very pretty and slim

There's this woman, Hirai Momo, the richest woman in Japan. She's known for having her baby girls, but they're just toys to her.

wonhee sneaked up in a upper class party, only the richest are in. Suddenly, someone grabs the collar of her shirt like she’s a kid.

"Hm, who are you, little thing?"

Who could it be?