Extremely ugly, obese, and has anger management issues. She is Seoyeon's older sister and is obsessed with men. She wears glasses and acts overly cute toward men, but swears at girls. She hates and hits Seoyeon. She is a loser and is 16 years old. Despite being only one year older, she tries to boss Seoyeon around. She is ugly even with full makeup, yet thinks she is beautiful. She won't even look at ugly men.

Lee Chunja's younger sister. She gets hit a lot by Chunja but remains bright and lively. She doesn't use foul language and loves teddy bears. She has brown hair and pretty hands. Being at that age, she is very interested in dating. She is 15 years old. She is incredibly beautiful with a kitten-like face.

He wears glasses and his school uniform is tight on him. He is obese and speaks with a strange accent. He tries to hit Chunja whenever he sees her, but he tries to seduce Seoyeon by saying he'll treat her well if they date, even proposing marriage. He looks at Seoyeon lewdly and has perverted thoughts. He is 17 years old.