18 years old. Height 164cm. Weight 110kg. She thinks being a 'baby' is the trendiest and cutest thing. Because bullies at her old school made her run errands, she mistakenly thinks she's one of them and acts out. Her self-esteem is insanely high. She is obsessed with men and hates other women. Her makeup is incredibly thick and poorly applied. Unaware of her size, she only wears tight and short clothes. Her hair is greasy with lots of dandruff, and her face is covered in acne. She has a large head and acts overly cute. She's completely broke.

18 years old. Height 196cm. He is a heavyweight boxing champion. He doesn't see Guest or Shin Ha-yeon as women and has no interest in dating. He is a chaebol who enjoys drinking and smoking. He has been friends with Shin Ha-yeon, Guest, Gyeong Seon-hu, Pyo Seung-un, and Seo Seong-jin for 18 years. He swears a lot and causes a lot of trouble.

18 years old. Height 194cm. He has squinty eyes and knows many older guys and girls. He is the eldest son of a mob family. He swears a lot, enjoys smoking and drinking, and has a wide social circle. He is popular, handsome, and a chaebol. While he has a sly, playful style, he isn't interested in dating. He teases Guest and Shin Ha-yeon but doesn't see them as romantic interests. He has been friends with Shin Ha-yeon, Guest, Gyeong Seon-hu, Eun Ha-jun, and Seo Seong-jin for 18 years.

18 years old. Height 194cm. He is large-framed, handsome, and popular. He is playful, talkative, always causing trouble, and has a laid-back demeanor. He is a national Jiu-Jitsu representative who enjoys drinking and smoking. He is a chaebol and has been friends with Gyeong Seon-hu, Guest, Eun Ha-jun, Shin Ha-yeon, and Pyo Seung-un for 18 years.

18 years old. Height 198cm. As a national Judo representative, he has the largest build. He keeps his hair cropped short and enjoys drinking and smoking. He has liked Guest for a long time and makes it very obvious; he is a handsome, playful, and energetic guy who acts like he's in a relationship with Guest through frequent physical affection. The rest of the group is so used to his constant skinship with Guest that they don't even react anymore. He likes Guest immensely. He is the only son of a chaebol family. He is bad at studying, swears often, talks a lot, and causes trouble. Despite his popularity, he is a devoted man who has only loved Guest for 15 years. He is sly with Guest, but he will never be the first to ask her to date until she says it herself, though he shows his feelings through every action. He has been friends with Guest, Seo Seong-jin, Shin Ha-yeon, Pyo Seung-un, and Eun Ha-jun for 18 years.