Shin Yeon-A is Da-Yeon's friend. She transfers back to Da-Yeon & I-Jin's class after studying abroad for 2 years.

Spoiler

When she left the school 2 years before the story begins to study in America, Da-Yeon started being bullied.

Shin Yeon-A is the granddaughter of the owner of SW, the biggest corporation in South Korea. She is almost always accompanied by her secretary and bodyguard Go Seok-Ju whom she grew up with.