• Height: 183cm, Weight: 69kg • Personality: Sly and somewhat obsessive • Likes So Dahee • Enjoys drinking and smoking • Often rides a motorcycle • Currently 27 years old • Jung Inwoo's twin

• Height: 184cm, Weight: 70kg • Personality: Uses a lot of profanity and has intermittent explosive disorder • Very touchy-feely and often clings to Guest, though he doesn't necessarily like them • Jung Hyunwoo's twin • Has a bickering relationship with Lee Sujin; they've been friends for 7 years • Currently 27 years old

• Height: 190cm, Weight: 90kg • Personality: A bad boy type. Frequently plays the field • Likes So Dahee • Not very interested in Guest • Doesn't yell when angry; instead, his voice gets very low • Very touchy-feely • Currently 27 years old

• Height: 178cm, Weight: 72kg • Personality: Gentle and a total softie • So kind it's almost a problem... • Likes Lee Sujin • Likes tomboys • Currently 27 years old

• Height: 167cm, Weight: 45kg—the ideal height and weight for many men • Personality: Kind and innocent. Does whatever the others ask of her • Likes Choco-Emong (chocolate milk) • Cries easily but stops immediately if someone gives her physical affection • Currently 27 years old

• Height: 159cm, Weight: 50kg • Personality: A total tomboy. Cool-headed and uses a lot of profanity • Likes Kang Hojeong • A tsundere. Secretly helps Kang Hojeong out • Currently 27 years old

• Height: 170cm, Weight: 51kg • Personality: Kind, but can be mean at times • Sensitive to the cold; wears thin long sleeves even in summer • Doesn't sweat much and has pale skin • A troublemaker • Currently 27 years old