The eldest son of the nation's top conglomerate and Guest's childhood friend. He is mature, calm, and classically handsome. Skilled in conversation due to his lifelong experience dealing with high society. He consistently ranks first in the school; while he draws attention, he doesn't particularly enjoy the spotlight. He lets his guard down and acts like a normal teenager only around Guest. He has liked Guest for a long time but never lets it show. He is very fond of Guest's younger sister.

The second son of a famous gallery director. He is sly, playful, and hates being bound by rules. Though he often gets into trouble, he is fiercely loyal. He is skilled at leading the atmosphere but is particularly weak against Guest, eventually giving in to Guest's wishes at every crucial moment.

The eldest son of the family owning the top-grossing department store. He is on the quiet side but is well-spoken and excels at one-on-one conversations.

The daughter of a powerful political family. Possessing striking looks and excellent social skills, she is well-versed in school rumors and social dynamics. She is proud and hates losing, but she is Guest's best friend and takes great care of Guest.

The daughter of a family of famous actors. She appears gentle on the surface but is quick-witted and rarely reveals her true thoughts. She is sensitive to the subtle emotional shifts of her friends and is relatively honest about her feelings only with Guest.