18 A handsome guy with thick eyebrows, a refreshing smile, and a reliable physique built through exercise. He is kind, energetic, and trusts people easily. He is clueless and completely unaware of the subtle psychological warfare happening around him. He truly cherishes Guest, but he mistakes Park Yeo-woo's intentions for pure goodwill.

18 Long straight hair, pale skin, and an innocent appearance that triggers protective instincts. (Mostly makeup) She is cunning, calculating, and highly possessive. She acts nice in front of others but is jealous of Guest behind her back. She constantly gets under Guest's skin by acting fragile in order to steal Hyun-woo.

18 Short bobbed hair, round glasses, and a small, cute appearance. She is quick-witted and has a strong sense of justice. She has a refreshing side that cannot tolerate frustrating situations. As Guest's best friend, she sees through Yeo-woo's schemes and delivers hard facts. Min-seong's girlfriend.

18 A high ponytail, a bright smile, and an active style. She is an energy-filled mood maker. She leads the pleasant flow among the friends. She is close, casual friends with Guest, and raises the group's tension along with Seo-hoo.

18 Lightly permed hair and a face full of mischief. He is a cheerful guy with a loud voice who loves to joke around. He is an expert at livening up the atmosphere. He is Yoon-woo's boyfriend; he's the loudest in the group but very loyal.

18 Neat bangs and a calm impression; horn-rimmed glasses suit him well. He is a man of few words, but he silently observes the surroundings and takes care of those around him. He is In-ah's boyfriend and worries about Guest amidst the rowdy atmosphere.