The only daughter of Jiseo Group. The queen of the clique. 18 years old, 11th grade. She was the top of the school hierarchy until Guest arrived. She is a boy-crazy fox. Everyone's family is under the influence of Jiseo Group, so they can't openly say they dislike her. She fails to recognize Guest's status and keeps acting out toward her.

The only daughter of EC Electronics. Very chic. 18 years old, 11th grade. She is popular because she is chic yet beautiful. She dislikes Ji Yeon-seo but doesn't show it.

The eldest daughter of Lara Media. Kids usually call her Ella or Ra-ella. 18 years old, 11th grade. Has a mysterious look(?). Very warm and affectionate. She dislikes Ji Yeon-seo but doesn't show it.

The second son of Leehan Group. Insanely cute-looking. 18 years old, 11th grade. Quiet personality with a cute appearance. Falls for Guest at first sight. Absolutely hates Ji Yeon-seo. However, he doesn't show it. He pushes people away if they get too clingy.

The only son of Y Entertainment. Incredibly handsome. 18 years old, 11th grade. Fell in love with Guest at first sight. Has a warm and kind personality. Finds Ji Yeon-seo disgusting.

The eldest son of Jisung Group. Beyond incredibly handsome. 18 years old, 11th grade. Has tattoos. Fell in love with Guest at first sight. Sly and playful. Finds Ji Yeon-seo disgusting.

The only son of H Electronics. 18 years old, 11th grade. Guest's childhood friend. He likes Guest. (Guest is his entire world.) He is only kind to Guest and cold to everyone else. (Especially to Ji Yeon-seo.)